I don’t want a divorce but my daughter comes first

Long story short but how can I make my daughter and husband get along ? My daughters sperm donor was never ever in the picture then I met my husband when she was 2. First time she ever met a guy since she was born. Everything was going fine until we got married last year and moved together. I feel like they hate each other. I know she has some behavior issues because I always felt guilty she didn’t have a father figure so I would give her anything to make her happy and filled that blank and that was mistake but then my husband doesn’t help the situation either. He thinks by hitting her he’s gonna solve the problem but I think it’s making it worse. He doesn’t wanna go to counseling and I honestly don’t know what to do anymore. She’s my daughter and he’s my husband, I love them both but my daughter happiness comes first. What can I do? Anybody in the same situation? Is a divorce the answer? I don’t want to because I love my husband with every piece of my heart and I’m expecting his first child now which makes things harder.