I just don't agree with their programming choices, and I don't really know who greenlighted the projects you can find on these stations (I'll shove one out--that Brandy and Mr. Whiskers). I guess when you grow up with the old Disney Afternoon in the early 90s its hard to like what you've seen some other cartoons become.
I assume that when you say you grew up with the old Disney shows, that you imply that other shows were involved too. I grew up to those 90s shows, too. Shows like Teenage Mutant Ninja Turtles, Darkwing Duck, Rescue Rangers, Gargoyles, and to a lesser extent, shows like Blake and Mortimer, The Tick, Animaniacs, the Warner Bros shows, The Head (now that was a weird cartoon, but entertaining nonetheless).
Disney wasn't the only game in town for youth television, not by a long shot. I don't like to call today's cartoons "Bad" but I will agree that they are very different when we're used to the 90s cartoons. I haven't watched a lot of the newer cartoons so I can't offer a strong arguement about them. Whether or not they're truly "better" or "worse" is primarily subjective. If you grew up on the shows of today, they may seem as normal as our shows did back in the 90s.