(Hated Trope) Endings so awful they completely destroy the legacy of the media.

[u/MeepMan324]

1. Two and a Half Men's final episode teased Charlie Sheen's character coming back and going to harm the other characters whilst also having insults to his character and Charlie Sheen himself. It's clear the director had a grudge and the ending where his character comes up to knock then get crushed by a piano before it cuts to the director before he says "winning" before getting crushed by another piano
2. This was an upbeat animated show about a magical teen princess. The writers desperately wanted a romantic endgame for her and her best friend, but the way they got there was essentially multiversal omnicide. To stop a villain, the main character unilaterally decides magic is the root of all evil and destroys it entirely. By doing this, she casually commits mass genocide against every purely magical being in the multiverse. It also triggers a massive apocalyptic event that violently crashes different dimensions together into a chaotic hellscape. But the show frames this horrific, mass-extinction catastrophe as a sweet, triumphant ending just because two teenagers get to hold hands in the rubble (Star Vs The Forces Of Evil)

[u/Kirosh2]

His editor was still the same as for Chainsaw Man, and is the editor for works like Spy x Family, Dandadan, or Centuria as well.

I feel like it's more likely Fujimoto got burned out of his own series, and ended it with what he had planned.

Except that it doesn't fit the buildup to it at all.

[u/chum-guzzling-shark → u/Kirosh2]

didnt they part ways from the publisher?

[u/Kirosh2 → u/chum-guzzling-shark]

The editor built his own publishing company, but was still working with the Jump on those series with a contract.

The full departure is recent, and might have been because he was trying to poach talents to his company (based on rumors). And we do know that Fujimoto will follow him no matter what, as he has been his editor since his Fire Punch Days.