I think it should go without saying that cunts are complex. There's a series of interviews with Waters, Wright, Gilmore and Mason that you can find on youtube, mainly with respect to Sid Barrett and what happened to him. I watched all these a few years back because... because well fixation with Barrett that I'm not necessarily particularly proud about. But anyway my impressions on the personalities of the four
Wright just comes across as distant and uncomfortable being interviewed
Gilmore comes across as thoughtful and relatively humble
Mason comes across as a "brutally honest" type and frankly pretty heartless
Waters comes across as a big, forceful personality who's also very emotional (he broke down in tears) and basically caring
I kinda liked Waters in that interview but he's very wedded to the dubious "Sid was an acid casualty" theory and is very much the type who has no self-doubt. I could imagine he's a very decent guy if you knew him. Most of the time. But that's tempered by a big ego and I don't know quite what happens when someone challenges that ego - I guess his band mates eventually found out. But it's not surprising that he's a) into left wing politics and b) doing it really badly. And really it's as a public figure that we know him anyway, so maybe his heart is in the right place in some sense but in some ways that just makes it worse.