It sounds like he has chosen drinking over a normal happy life, as any active alcoholic will do. I suppose you could have a bet with him over the two week thing. If he doesn’t make it he goes to treatment or some such, but the fact that he admits he couldn’t make 30 days probably says it all. The show thing is just an excuse btw.
He sounds like a very sick man. As you may know, alcoholism is progressive and will only get worse. One thing that folks did that helped me was to stop enabling me. They kicked me out, fired me, banned me from their homes, generally refused to tolerate my behaviour. I reached a point where there was nothing left and that was the point at which I woke up and got help.
I am very grateful to those people. They saved my life.
There were those too who, for a long time, covered up for me, lied for me, made excuses for me, helped me out when I got in trouble. They did it with the best of intentions, but they only succeeded in making me worse.