I feel conflicting emotions, so I'll just say both. You are right being resolute and even harsh. You can't live with an abusive person, you don't have to, it wouldn't even help him.
But also, I can't help thinking that no person asks to be put into life. Children are given birth by people so they give meaning and fulfill parents' life. Whe they reveal to be defective, not that nice... what to do?