Cartoon Network lost its mind several years ago. I mean, what cartoons do they have on the air now? Some crappy show called Camp Lazlo, Fosters, and the previously mentioned My Gym Partner was a Monkey? All crap, IMO, and not because I'm 18 and am "too old for those shows."
Sure, many of the cartoons looked the same when Genndy Tartakovsky was king, but at least most of his shows were good.