ANSWER:

It is your right in islam to ask for a separate accommodation. It is not allowed for him to hit you like this as this is domestic violence and most countries incriminate such an action. Consult your parents and elders and then you can come with a decision. 

https://www.assimalhakeem.net/my-motherinlaw-is-bing-vry-aggressive-and-vile-towards-me-im-not-allowd-to-sit-with-the-family-eat-with-the-family-n-also-cook-for-my-husband-or-myself-she-says-i-cant-eat-the-food-she-makes-whe/

I’m married for 7 yrs and live with my mother in law who is worst with me, always try to ruin my marriage. Me and husband fight bcz of her, he had hit me many times. He made me a servant and my kids obedient by hitting. I still behave well but now I want a separate house he refused, said I will not leave my mother and want me to live close to sis in law whr thr is joimt family system. Wht shd I do