I didn't read the other replies, but want to say Welcome, and hope you read more. I too didn't hate the Witnesses when I first got out, but as I have been out for about 5 years now (I'm your age), I am starting to get more negative. Also, keep in mind your experience with the JWs themselves sounds positive, others have had horrible experiences with JWs.
So sorry about your recent troubles. Its hard when family member has permenant change in mental status, my sister did too, and it is such a stress, has changed the family forever. Glad you're back in school.
So I think just keep in mind that you are right for appreciating the loving people you were surrounded with in your childhood and youth. But it's too bad that these rules/The Society has had such an invasive effect on the minds of otherwise good and sincere people. I think individual witnesses are just like everyone: some sincere, some not so nice. But when they get something in their head, for example to shun someone like yourself who may need help and support, they turn into something that they wouldn't have normally been.