I do not think the girls really need you. first, to say. they do not even live with him. No matter what you do at the end of the day it'll be their mothers. if he is physically abusing you you can get counseling if it really worth it, otherwise move on. I do not think you need to move to another state. you are free to live wherever you feel comfortable. what you need is determination to do so.

you should love yourself first. do not sacrifice your life for him neither his daughters if he can't understand. you might regret it later on.