Worse than being mentally abusive, he is physically abusive.
Having WLS wouldn't change that.
You need to do what is right for you. If you think marriage counseling would work and he receiving individual counseling and AA intervention would help, then give it a try if you want to save this relationship.
He has no right to ever physically (or mentally abuse you).
IMHO, unless he wants to really change, things will probably only get more abusive.
Maybe spend the next few nights at a good friend's or relative's house for both of you to think things over.
I wish you the best for whatever choice you make. I'm sorry your New Year started this way.