Too many “what got cancelled too soon” questions, what’s a show that went on too long?
Hard mode: no The Walking Dead
Seriously folks - there can be only one and done:
HEROES
Save the cheerleader, save the world and then please - go home. But nooooo…/
The Office (US version) went downhill in seasons 8 and 9 without Steve Carrell. But the ending of the show was satisfying. They brought back Steve for that.
Dexter
Edit: Weeds
Spongebob had an astounding three season run. I could probably even go to bat for a few of the season four episodes.
But thirteen seasons and counting? Other than handsome Squidward, I can’t think of a single joke/scene that people love from an episode post-movie.
The Simpsons is still going.
It hasn’t been good for over a decade or more at this point.
The definitive answer is Supernatural. Shambled on for another 10 seasons as the reanimated husk of a really good that was written to end after season 5.
Star Trek discovery, should have ended after the intro
The last season of Scrubs. They basically switched out the main character. Should have been a different show.
The Simpsons
Family Guy
Amazon’s The Rings of Power.
It should have been cancelled 8 episodes ago.
Wayward Pines
Arrested Development
Westworld. First season was perfect and it concluded perfectly fine.
The Blacklist. Started out great and then I couldn’t even finish the last series.