Unless he is falling down, stinking drunk, driving drunk with the kids in the car, beating on you guys and yelling at you when he is drunk, depriving you of food, necessities and medical care, it might be better to live in the same home, but have an understanding. I am still hollow inside from my dad leaving our home when I was 9. Our family was disentigrated by my parent's divorce. Having Dad around would have kept my mother happier and we would not have felt abandoned and unimportant to him. We kids are still hurting and we are all over 50. My oldest brother dropped out of his senior year in high school with straight A's after my parent's divorce. He backpacked and hitchhiked all over the USA and he died at 22, feeling very lost and wandering.
There are situations where divorce is necessary though: sexual abuse being one reason.