I have AvPD, and I am sure there is a genetic link, but it's hard to separate it from my mother's issues and treatment of me. She had schizo-affective bipolar and was an alcoholic on top of that.
I've found therapy to be a bit frustrating, because I am able to cope with my fears and recognize when I'm slipping into avoidance but still unable to form connections with people. I've been released from therapy but still don't have any friends or relationships because I still react to other people's unpredictable emotions with fawning and then cutting them out of my life lol
It's a very lonely disorder