So to summarise, it was the attitudes of the people you lived with - your most treasured and trusted - who forced you on to a crash course against the religion?
No not against, it was a crash course FOR, I had no idea that I was about to open pandoras box. What they said about Islam upset me, what I found out was they were right.
Was it soley the apparent "lack" of womens rights in islam that forced you to leave? Or was that just the proverbial straw that broke the camels back? Did you have any deeply phillosophical contentions with the underlying teachings of islam (strict monotheism)?
It wasn't quite the proverbial straw, because I was raised to be a self hating woman, "can I go out and play mum" = "no, you are not a boy" you soon begin to resent being a female, if you are riased being told women are stupid, then you may find it easier to stomach being second rate and meaningless, the only value in your virginity, ability to breed and ability to please your husband.
No, see what broke the camel/straw/back was the life of mohammed, was the role model I was meant to wish for in a husband, was the intolerance to those choosing a path outside of abraham, was the hatred towards all things Jewish (human), was the sanctifying of slavery when waging war in the name of Islam.
Even the monotheism, the idea of god was a difficult concept to fully embrace, always asking if one made us then who made the one, if we can not exist without creation, then doesn't the same apply to "him". But you can dismiss those musings at times with a mental squish on those ideas, "I can not understand everything with my human mind"
Once the religion fell apart in pieces so did the belief in god.