I have a firm and unwavering hatred for Star Wars: The Clone Wars. Having seen the Trilogy and the pretenders (episodes 1-3) there is absolutely no chance of drama whatsoever. I know that every main character, even a lot of the supporting characters, are going to survive so anytime they show Anakin in 'mortal peril' I know that he's going to escape. Plus, I loathe the new 'Star Wars' trilogy.
Fanboy and Chum-chum and Almost Naked Animals are both horrible shows due to idiotic jokes and eighth-assed puns (especially Poopintine from Fanboy and Chum-chum).
Johnny test gets an (dis)honorable mention because of the endlessly recycled plots, with only minor inconsequential changes (i.e. different villain or location), and recycled jokes.
I have to also mention Family Guy for its overuse of 'overly long gags', like several minutes of Conway Twitty or nearly Peter skating around repeating 'Starlight Express'. Though I haven't seen the show in months, so they may have moved away from that particular crime.