In these situations, the best thing to do is to cut off contact with them. You're not obligated to endure abuse, even from members of your immediate family.

If these are more distant relatives who only show up around holidays, then it's time to tell your family that you're not coming home for Thanksgiving (or whatever).

If you're living at home, it's time to make a plan to GET OUT. Secure enough financial resources to move out of that house. If you're under-aged, then you can make a plan you can execute on as soon as you're 18.