You asked the question, so I'll give you my answer. Yes, YOU ARE WASTING YOUR TIME. Talk to him until you are blue in the face, show him the facts, get out the camcorder and film him during a drunken frolick.
You are wasting your time explaining to anyone else what is wrong with them. It's his problem. He owns it. You do not own it. Take it from somebody who has married TWO ALCOHOLICS. You ARE wasting your time.
He thinks you are ridiculous and he thinks you rant. Enough said.