I got so sick of the Worms in seasons 2-4. They were a single joke, coffee addiction, restated over and over and over and over and over. That's boring. At least in their brief season 1 appearances (well, at least in the pilot), they were allowed to have other vices and interests, though not to the same extent as in the movie, of course. But from "The Take No Prisoners Syndrome" onward, coffee obsession was the entirety of their characterization. And while that would've been tiresome and shallow enough in background running-gag characters, the really unbearable thing is that the Worms ultimately became the de facto stars of the show!
I've never understood this idea that taking one thin joke and repeating it constantly for episode after episode constitutes comedy. It's homeopathic humor, diluting the minimum possible amount of content in the maximum possible volume. It's the same reason I gave up on Saturday Night Live in the '90s.