Can't believe no one has mentioned Allen Gregory yet for worst sitcom ever. Not only are they're ripping off Family Guy, but takes the literal worse parts of FG and plays them straight. All of the characters are either messed up, complete assholes or both, and the jokes are either weak or just plain wrong on so many levels, (and that's coming from someone who honestly has low standards for humor) it's hard not to laugh, much less get a few chuckles out of it.
It's no wonder why Fox wanted none of that after 7 episodes, and they are known for having crap sitcoms outside of The Simpsons and King of the Hill.
Just stop worrying, and love the bomb.