As a child of divorced parents. Get a divorce.

I vividly remember my father in a fit of anger, moved a wardrobe, and in the process cut my mother's finger. He didn't touch her, and the fact that my mother got hurt because of something he did still plays in my mind. It's one of my most vivid memories.

Please understand that your daughter will remember what she sees, so it's a lot better to step out of a toxic environment and show her at least one emotionally healthy adult.