I don't get the Hub, so I can't judge that one.
I'll agree with the majority here. Cartoon Network is far and away the best of the cartoon channels. I think they sort of hit a low point from like 2007-2009, but they seem to be getting back on their feet.
Next is Disney, which isn't exactly spectacular, either, as they've got nothing outside of Phineas and Ferb and Gravity Falls. However, what else is new? Disney has never been all cartoons, even in the "golden age of children's programming" that was the 90s. Even back in most of your childhoods, they had stuff like Lizzie McGuire and Even Stevens.
Nickelodeon, however, is horrible. Nothing but Spongebob reruns, and certainly nothing good except for The Legend of Korra and TMNT. Seriously, at least Disney is giving some variety in their shows instead of constantly replaying whatever happens to be popular over and over again.
Then again, I'm slightly biased, because I can't stand Viacom (Vilecom, as I call them). They ruin pretty much everything they touch. Nickelodeon, MTV, Comedy Central... everything.
Though out of curiosity, why are people bashing Nickelodeon for showing live action shows? Nickelodeon has always had live action shows, even back in the 90s with All That!, Kenan and Kel, Clarissa Explains it All, etc.