Oh my. Well, I'm lucky in one aspect. I have thoroughly trained my family. Behave (by the AbiFae definition) or I don't visit. For some bizarre reason they want me to visit so badly that they behave. And when their bs level threatens to drown me, I tell them I'm done now.
So, my dad no longer prays loudly and ostentatiously before meals when we eat out (I have no issue with prayer before eating. Studies have even show you digest the food better when you pray first, my issue is that he holds up a neon sign that says "GOOD CHRISTIAN HERE!!" with arrows pointed at him while he does so. LOL. So now he prays quietly to himself and then digs in.
My mom no longer mentions how fat I am. In fact, I've weened her away from insults around the subject. "Oh, isn't that a lovely fattening piece of cheese. Do you go to the gym every day still? You really should. You look great, by the way."
Although they are all oddly and over interested in my sex life.
So, that's my advice: ground family members from visiting with a list of reasons you cannot have them around and see if they wanna see you enough to change.
I'm not totally unreasonable. I haven't asked my mom to not ramble psychotically and pointlessly, driving me nuts because I cannot find the point and she has no logic