Hello Scrapiron and everyone!!!
I really wish they had not taken down the "like" button off this site. I would have "liked" everything posted here so far.
Scrapiron, I'm going to add my 2cents. Your situation has some things that parallel stuff I have walked away from.
Your exGF sounds like one of my sisters. I spent years trying to figure out why she was so crazy and starting fights with me. Throw in the other sister, who is her cat's paw, and you have quite the tag team.
At a point in time, I was speculating that she might be the way she was because she was an alcoholic. Then, I reached the place in my head where I just didn't care why she was what she was.
I severed all contact with both sisters 7-1/2 years ago. I have not regretted this decision one time.
Fast forward to now. I am in the process of job hunting 2500 miles away. My town has started to remind me of my sisters.....
I wish you all the best in your path to freedom.