Only to support you and tell you that I’m with you when you give him the ultimatum that he seems to ask for with the top of his lungs.
You are perfectly conscious that he has to fix his behaviour. Many times, a person only are able to see something is going wrong when a loved one wakes him up and make him see it very clearly. He can manage these outbursts but he needs to be conscious of how damage they produce.

Good luck and be strong, it might worth.