Everyone here understands why you are angry.
I was married for over 20 years before my husband began heavy drinking.
I almost left him 15 years ago. I regret that I did not. He won me over with crocodile tears and he was so depressed. (Hello!) I din't know then what I know now. I was about your age then.
Learn everything you can about alcoholism. The more you understand the less crazy you have to be.