I could write an entire freaking college-level essay on why I hate Johnny Test. The show is just so poorly handled it's horrifying. I have no clue how it has lasted this long or why it was renewed for yet another season.
Like a lot of other people, I don't like Problem Solverz either, but at least that show TRIES to be funny and artistically valid (although I personally don't think purposefully bad drawings and collour pallets that are meant to HURT you eyes count as an artistic style).
I also think the Total Drama series has overstayed its welcome (for those of you who don't keep up with cartoon news, it's coming back). And while I don't think it's still on the air that 6teen crap -and the beach one- was horrid.
I stopped watching spongebob a long time ago, but from what I hear its really gone down the shitter.
I did recently watch an episode of Family Guy after a long ass time, and the jokes really have turned to shit. A five minute rip of the beacon lighting scene from Lord of the Rings is supposed to be a goddamn JOKE!? I don't care what you say, that shit's not funny anymore. Hell, American Dad is funnier and that's a spinoff show! All Family Guy is doing now is cashing in on the stoner crowd.
I don't really watch shows for really young kids or toddlers anymore, so I can't really join in the hate brigade on that front.
I also turn the channel every time Sidekicks and Almost Naked Animals comes on because I'm positive I'll hate them.
I hate the Penguins of Maddagasgar, without even having seen an episode, simply for it being a shitty movie tie-in show that follows in Jimmy Neutron and Barnyard's (also hated shows) footsteps.
I also hate Mongo Wrestling Alliance, but I think that has more to do with me never having been a wrestling fan. I used to hate Squidbillies too, but that show ended up growing on me (much like King of the Hill did).
Finally, I'm surpriesed there's so much hate for Cartoon Network's new cartoons. I mean, compared to the horrors that were Camp Lazlo, My Gym Partner is a Monkey *shudder*, and the live-action bullcrap, Chowder, Flapjack, Adventure Time, Gumball, Regular Show, and MAD are a freaking GODSEND!
EDIT OH! And I really, really, REALLY, hate Bakugan! That shit is designed to wrangle as much money out of kids as humanly possible- even worse than any cartoon you might be thinking to compare it to. Here's what I learned about the rules from a kid who came to the toy store where I worked:
Parts required: Mat for playing on, action figures, cards, action figure launchers, MORE action figures from a "different class", fucking DICE, and even MORE action figures that are slightly bigger than the others!
Did I mention all this shit is REQUIRED, and it's all sold separately at ridiculously marked-up prices?
And Pony haters? I DARE you to go on The Hub, on a weekday (Tues-Fri only) at 1:00 in the afternoon and marathon Strawberry Shortcake, MLP: FiM, and JEM. I swear to god if you don't think ponies are a step in the right direction for not just girls cartoons, but cartoons in general, after that, then you are either a liar or fucking brain-dead!