Hi asorta:
It's really ashame that you had it so tough when growing up. Your Mom sounds like she probably has alot of issues going on there topped with a good dose of JW paranioa. Just a thought, but maybe if you stay away from all religious topics when around her, and she agrees to this, you could deal with the other emotions that come from her physical ailments--drinking, low-self esteem, abuse, etc. It looks like you have your plate full with just those issues.
What advice you get here on this forum, you must take, digest, and apply it (or not) to your own situation. Not really knowing you and your Mom personally, it is hard to give out advice. I, personally, don't want to hurt any relationship you two might have at the present time.
I had a Mom that had a drinking problem, too. She also had very low self esteem, had problems with people just in general. Her life was a pretty sad state most of the time. She made it so difficult for herself to just get along with other people. It seems she put obstacles in her way on purpose so she wouldn't have to deal with life's problems. It sounds like your Mom and my Mom could have probably been very good friends!
My Mom died last year. It was a very difficult time. In the end, I look back and try to focus on the many good times we DID have. Because, when it comes down to it, we still love our family members despite what they have done to us in the past.
You can probably be the most help for your Mom by just being there for her when she needs you. Be encouraging and positive. Maybe some of that positive energy will rub off on her.
Best of Luck and Take Care
Mrs. Shakita