Second, I can offer you some advice that may or may not be helpful. My father had years of familial strife and issues with his father, brothers, and step mother. One day, after a lot of careful thought, he sat his father down, and told him that he wasn't going to be part of the strife and silly games anymore. My father gave his father a phone number and said "I'll do everything I can to keep this phone number. If you ever really want to talk this stuff out, you can call."
It took about 20 years and a terminal case of brain cancer, but the phone call came. And more importantly, in those 20 years, my father was able to focus on building a family and a career of his own, free of the pettiness, bickering, and abuse of his own family. It's hard to draw a line in the sand and set boundaries. It's hard to admit that a person you love will never give you the praise or acceptance you want so bad from them.
If you do accept it though, and you do draw a line in the sand, I bet you're going to be much better off for it.