I plan to cut ties with my mentally unstable husband.
Why would you cut him off?
He's an asshole towards me. He hurts me on a daily basis.
I'm sorry to hear that he's being abusive towards you. You should leave him if he's truly being this terrible.
I have no idea what to do.
If your husband is being abusive towards you, then you shouldn't feel obligated to remain in the relationship. Spouses should never abuse one another, so if he's hurting you then he's not honoring his marriage vows.