I invested LDS truth claims and found the following:
Book of Abraham... Egyptologists translations of the facsimiles in the Book of Abraham and papyri found in 1966 don't match Joseph Smith translations. No official answer of translation problem by the church - only varying opinions of apologists with no authority, Some of the most problematic doctrine comes from BOA - polygamy, multiple gods & denying blacks the priesthood. And the BOA wasn't even canonized by LDS church until 30+ years after JS died. RLDS Church has always denied BOA as scripture.
Translation Process of BOM is troubling. Stone in hat without having plates even in the room is not credible. Urim and Thummim term not applied until many years afterward and really only applied to the stones used for the first 116 pages which were lost. Those seer stones were taken by Moroni after the first 116 pages were lost and JS used a seer stone that he found while digging a well many years before the BOM was even started. Seer stone is in possession of the church now but never talked about - embarrassing to the church to think about it. Why would the angel have JS resort to using the stone that he found in a well many years before?
JS used same process and seer stone to look for treasure and never found any. 1826 Court records verify this. JS said that every man should have a seer stone - indicating he used this as a real seer stone instead of just a random object to focus on. Imagine what would happen if the current prophet said he received revelation by putting his face in a hat with a stone.
Book of Mormon Difficulties. No archeological evidence ever found supporting BOM. No linguistic evidence ever found. Lack of evidence from two large battles at Hill Cumorah where 2+ million people died. Things mentioned that historians and scientists say didn't exist in Americas in BOM times - e.g. horses, elephants, steel, wheat, barley, etc. No mention of things that Indians did use such as corn. DNA evidence indicates modern-day Indians descended from Asia not Israel as church teaches. Rare errors of translation in Bible are duplicated in BOM when those verses also appear in BOM - e.g. incorrect plural of words and incorrectly using the term Lucifer. This wouldn't happen if words came from different source as claimed by using the golden plates. Original version was very different than current version - poor grammar, mistakes, and format.
Most correct book on the earth? Much of the Book of Mormon is plagiarized from The Bible. Some quotes from the Bible were quoted before they were even written in the Bible before the Biblical prophets were even born.
Problem of numbers in the BOM. How could huge armies rise up in short time period from a handful of people to sustain the nonstop wars - both by Jaredites and later by Nephites/Lamanites. Implausibility of events in BOM - Jarodite submarines carrying people and livestock for 300+ days, etc. Other 'inspired' works written by people with limited education and ability that have defied critics - Quran by Mohammed & Numerous works by Patience Worth who also dictated her manuscripts to scribes.
Witnesses. Testimony of the witnesses not as convincing as taught - conflicting statements, observations may have only been visionary in nature per statements made by the witnesses. Most witnesses left the church, were very gullible and believed in magic, followed false prophet James Strang with little evidence.
Temple. Ceremony taken from Masons. If Masonry had original temple ceremony but became distorted over time, why doesn't LDS ceremony more closely resemble an earlier form of Masonry, which should be more correct rather than the exact version that JS was exposed to in the 1830s? Silliness factor - pagan nature of ceremony. Does God really require a secret handshake and password to get into heaven? If so, all the Masons, former LDS and unworthy LDS know it as well.
Why the big deal with the death oaths of revealing the secrets of the ceremony when anyone can get the entire ceremony online or from books very easily? Numerous changes to the ceremony. Disturbing death oaths and ministers of other churches as agents of Satan in ceremony until 1990.
First Vision. May never have happened. Most important event in Church history never taught to members until 22 years after it happened. Multiple accounts contradict each other of who was there and reason for vision. Circumstances surrounding First Vision as relayed by JS were not true - e.g. protestant revivals.
Polygamy. How fun. Fundamentally polygamy is just wrong - a bad, self-serving practice with no real justification in the 19th century. Can hardly compare to Abraham in 2000 BC taking 2nd wife to have a son when his wife was beyond normal child-bearing years. Reasons told to members for polygamy are incorrect - it was illegal and not done just for widows. JS lied in public about practicing it, kept it from his wife (did not get her permission as stated as a requirement). Illegal and contradicts Article of Faith sustaining the laws of the land. Marrying women already married - no justification possible for this. Threatening, intimidating young girls to marry JS. BOM specifically condemns the practice. Still practiced in heaven - explain that to your wife.
Manifesto did not stop polygamy - needed 2nd manifesto -- and polygamous marriages still performed after that with approval of high church officials. Sealing of people to the prophets to ensure their exaltation - goes against leading good life to get there. Why do perhaps half of all LDS members think polygamy started with Brigham Young?
Kinderhook Plates. In the book 'History of the Church', which is almost scripture, detailed account of how JS translated a portion of the Kinderhook Plates. KP always believed to be true record of an ancient Jarodite until plate was found and proved to be a hoax in 20th century. KP published in Times & Seasons, which is a church-owned newspaper edited by Joseph Smith. He would have certainly refuted the comments attributed to him if he didn't make them. Besides, who else would claim that the person was a descendant of Ham through the loins of Pharaoh king of Egypt, and that he received his kingdom from the ruler of heaven & earth?
Prophets, Seers and Revelators since Joseph Smith. No prophet since Joseph Smith, has prophesied, seered or revealed really anything other than undoing what JS did such as ending polygamy and ban on blacks having the priesthood. Numerous items are available to be seered or translated - e.g. finish JS translation of the Bible, translate or verify translation of BOA papyri, Book of Joseph, Dead Sea Scrolls, etc. Why should the real value of having prophets be almost completely gone after the first prophet died? Why not comment on troubling issues like cloning organs, stem-cell research, etc.?
The prophet and leaders of the Church were duped by the Mark Hoffman forgeries. Modern prophets can't answer with surety the many troubling questions by members such as BOA translation problems. Modern prophets and apostles (special witnesses of Christ) have testimonies no different than anyone else. GBH has stated he does not receive audible revelation - seems to be just impressions and done by discussion and voting of apostles. Modern prophets (GBH) not answering questions 100% truthfully on TV - becoming Gods not doctrine, ducking polygamy questions, etc. Bizarre doctrine taught by early prophets and denounced by newer ones - e.g. Brigham Young's
Adam was God teachings.
Joseph Smith's Life and Family. History of treasure seeking. Magical view that existed in early 1800s - people believed in magic. Family was subject to visions like his dad and the Tree of Life dream. Strange claims - Zelph the white Lamanite, Garden of Eden in Missouri, 3 Nephites and apostle John still alive, etc.
Failed Prophecies - BOM copyright not sold, Christ return in 1800s if Joseph lived to be 80, Civil War prophecy not that impressive when analyzed, etc.
Kirtland bank scandal. Zion's Camp. Emma did not remain in LDS church. Imagine if modern prophet's wife left the Church after he died. Why did JS run for the U.S. presidency? Wouldn't God tell him he had no chance? Book of Commandments rewritten as the D&C after apostles apostatized. Failed prophecies removed, etc.
Joseph's translation of some of Bible verses are problematic. Also not one verse has been verified by the Dead Sea Scrolls or from the original Greek manuscripts that have since been found. His failure in calling a Greek Psalter an Egyptian document. Receiving priesthood account by Peter, James and John appears to have been made up. Not a literal event - not communicated until years after it happened.
Testimony. Unreliable method to discern the truth. People in other churches say the same basic thing about their church. Take the BOM promise - what really happened to you - anything really? Testimony is just emotion - good feeling that is replicated by reading good fiction books or seeing good movies, hearing good stories about Jesus. Placebo effect. Advice given to bear your testimony (lie) even if you don't have one and then you'll eventually gain one. Think about people that you know that have left the church - didn't they have a testimony? Feelings override facts?