This is ancient history but I played him once in super turbo at a mutual friend's house. I guarantee he doesn't remember who I am (so I'm not "revealing my powerlevel"). He beat me quickly with Zangief 360s, though it was basically a squash match as I hadn't played that game in years. I was obsessed with Capcom vs SNK 2 at the time (a superior game, the GOAT imo).
He beat me, I walked away, and someone took my place at his little ST station he set up. I don't remember any snorts, rocking, shit talking, gin breath, body odor, suspicious coffee travel mugs, or any other eccentric behavior. That's the closest thing to an "interesting story" I've got. I also don't remember any drama at the tournament I went to that he directed. That's why I think he used to be semi-normal and semi-functional.
I think he must have started drinking heavily alone on the internet at some point and that's when things started really taking a dive. I didn't hear RTU fatguy say anything about alcoholism, which is weird. It's a big part of the equation here.