Dude, 1,000% SpongeBob! The Fairly Odd Parents is hated by so many people now that it's not even funny...
FOP to me used to be great, but now since Poof came along the new episodes just all have basically lost their luster.
SpongeBob a lot of people say has gone downhill after the movie, but I still think this show can have great episodes, and it is still a very fun and entertaining show to watch, so I'm glad it's still on the air. To me the only real bad season was season 5 with only a few good episodes, seasons 4, 6, and 7 can still be pretty good because they can have quite a bit of episodes I like and I think are great in my opinion. I also think that since this show is on season seven now, it is slowly beginning to go back uphill again.