Community is just a string of pop-culture references. I don't find it funny, but then again I also don't spend hours on TV tropes either.
I found Arrested Development mediocre as well, and a lot of people claimed it was the funniest thing since sliced bread.
By the way, BBT is a mediocre show too. Which is why it is so amazing to see people arguing against it like it is worse than Hitler.
I watch BBT. I don't take it that seriously. It is a fine way to waste 20 minutes, and has low re-watch value. Just like tons of other shows (Family Guy, Friends, HIMYM, etc).