Need an opinion!

I was with my guy since July 1 of last year things started to get worse once he started to drink around me. he has had five violent altercations with me while having alcohol in his system that is when he started to accuse me of cheating and getting verbal abuse with me, I got tired of it and I told him I will not take it anymore so he refuse to leave. So I had to get my father and brother involved to get him out of my life. Why it is so hard for a man to let go? Am I wrong for ending this relationship?