The simpsons really do need to stop making episodes, they're getting really stale. As for South Park, because everything is focused on current events, I can't really say the same.
And the big bang theory is fucking terrible. Chucke Lorre can't write a females part to save his life, it worked in Two and a Half men because it was Charlie sheen, but here its evident that he can't write for shit when they dropped Leslie after 4 episodes when she was originally planned to be a full character. Laugh tracks need to be removed from sitcoms completely. They make references as their punchline similar to Family guy, and even then half the time, those arent event correct references. The show went to being dedicated to all of the guys to focusing more on Sheldon, who deserves to be punched in the dick so many different times. They tried to make a TV show catering to geek humor, and make it pleasing towards those who arent really geeks, and it flops hard, most of their original fanbase hates it.