One more factor I forgot to include. The big changes in the LDS temple ceremony in 1990. As LDS, I was taught that the Endowment was given by God and the same on that existed in ancient temples (many rank and file LDS believe this).
Then they made HUGE changes and I could not reconcile what I had been taught with the sudden disappearance of the penalties and the minister who was a hireling of Satan.
Either the principles, teaching and oaths were eternal or they were not.