Oh sweetie, what a horrible situation. There are no easy answers. You are heavily involved in trying to get him help, but unfortunately that’s not going to help. An alcoholic or addict will not get help until THEY decide they need help.

My only advice to you is to concentrate on your own wellness. You need to totally disengage from him when he’s drinking. Don’t try to reason or argue with him. Go to Al-anon meetings to connect with other people in your shoes. If you have a guest room in your home move in there to get some space. If you have pain Meds or anything else he can abuse, hide them or put them in a locked box. Read books about codependent behavior. There are many things you can do without moving out.