Putting Seinfeld and Big Bang in the same bucket hurts my soul. Not sure how either are bad for you though. People need a way to decompress and a 22min sitcom is a great way to transition from one mood to another.
I will admit it is not a perfect match, but both have a laugh track and both remain very popular. I think I may have been trying to get an agreement from several generations of sitcom enthusiasts.
How about Big Bang and Scrubs? Both are kinda silly and both kinda got bad the same way.
Seinfeld was recorded in front of a studio audience, so the laughs are real. The thing is though that they often did multiple takes of each scene, and the laughs are sometimes the ones from different takes.