"Bad people" isn't the schtick of Sunny or Seinfeld, or any comedy. Shitty people is a trope that's as old as comedy itself. Twists and turns of their lies, dastardly plans backfiring, etc. If you have a problem with that, I think your sense of humor is broken.

On the other hand, if you think their particular bits or premises aren't funny, you're just demonstrating you have bad taste, and that is fine.