I joined as a teenager, so I wasn't raised in it but I dont really consider myself an adult back then, even though I may have at the time.
To me it was hard to only associate exclusively with other JWs when you get the impression or feel like you are being judged by every little bit of action you do; how can you really open up youself to people like that? While I was in my teens I wasnt sexually active and I was just finding myself. I thought my gay feelings would eventually fade and it was just a phase but they really didn't. I never discussed them with anyone. I didn't trust anyone. I remember one assembly I went to years ago and I remember J. R. Brown being there and giving the talk and I remember him reading a letter supposedly coming from a ministerial servant who was a homosexual but not sexually active and J. R. Brown commented that he admired his determination, etc. They're probably ones like that in the congregation. I do remember the snide remarks from many of the "brothers and sisters" in regards to that part of the talk and thought, "where do these people come from who come into this congregation?" don't they realize that there are people like that all around them and they dont stop to think how remarks like that can hurt people? Where is the brotherly love and compression here? That kind of experience in itself would make me not ever open up to any JWs. In fact one of the people who said something rude was actually an elder who get me into "the troof" in the beginning. Knowing how he felt and many others, if I was to be completely honest, I know how I would be ostracized informally even if they didn't have anything against me to do it formally (disfellowshipping).
That was ONE thing. Another was the 1914 generation fiasco. They do not rule out any other idea that may come with what a scripture means. They only stick with a meaning that promotes their agenda, getting more converts and "placing" more literature.
One time I remember I use to pick up a brother for every meeting without fail; even let him stay with me temporarily when he needed to, took him out for breakfast sometimes before the meeting, etc. After he moved he wrote to keep up with everybody, except me. He was immature so I overlooked that.
Im not the same person as I was going into the organization and I dont think the organization is the same either. I have other reasons for not going back and many of them are similar to the other posts here.