I haven't watched past the first 4 or 5 episodes of S1, but from everything I've heard about the finale I'd be ok with it "winning" the title of worst.>Adventure Time
As lame as the episode was focusing on all the uninteresting loose ends while ignoring the main characters, the show had already lost its way for the last few years by this point, so I wasn't expecting anything special.>Samurai Jack
This is the winner for me. Most people did not expect a continuation for Samurai Jack, so Genndy pulling Adult Swim's support for a revival was just because he wanted to tell a fucking ENDING. This is what he wanted to say? Ep 8 being a literal troll episode, bullshit deus ex machina as a way to get Jack back to the past, killing off all the existing characters and ending on a downer for no reason. Add in the disappointment of the show starting off so incredibly strong before ending in such an underwhelming fashion. Clearly the winner in my book.>Gravity Falls
I agree with everybody's criticisms, but the worst episodes of S2 were a few episodes before the finale. The actual ending had reasonably exciting action and an emotional climax. The bad taste in my mouth was also washed out by the large-scale LARP quest held after (which was fun even through the autism and sabotage).>Korra
Complete bullshit, but like OP says, the show was pretty much awful all the way through.>Steven
I like the climax, it definitely holds up better when viewed while marathoning. The constant hiatus cycle added to a lot of disappointment with this show where it always seemed like things were hyped up for eventual letdowns.>Gumball
Cliffhanger series finales always make me sad, but the episode itself is not as bad as many of these others.