Community. It's so sad to see a that show that used to be creative and original has settled into lazy mediocrity. The first two seasons were great (and the third season, to a slightly lesser extent), with well-written characters, fantastic writing, a real sense of warmth and a real desire to be experimental (for an NBC show, at least).
But having watched season 4 for the last few months, I've pretty much given up on it. I don't get the sense that the new showrunners really care about the show. The characters have just been turned into one-dimensional stereotypes, the intelligent humour has been reduced to "ha-ha, we're making a movie/TV reference!", and most importantly, it's just not funny anymore.
When season 3 was on the brink of cancellation, I and many other people were desperate for NBC not to cancel it. But now I kind of hope they just axe the fucking thing already.
Also, South Park and the Simpsons, neither of which have been any good for years now.