It sounds so horrible, its something that others should be supporting you both with, im sorry rhat you feel so alone in this.
Everyone sees drinking alcohol as such a normal thing when in reality its a drug that should be classed like the rest of them. Alcohol is a big trigger and it causes so many problems!
I wish I could give you some more advise. I must say that when I was in this situation although they eventually saw the truth it was very much a fight like what you’ve been dealing with. Unfortunately some people never see the problem.