Attack on Titan; I followed the manga when it was still releasing monthly, and I can still remember when the leaks came out for the final chapter and the utter disbelief across the fandom. I think this was about midway during the first part of 'Final Season' (and I feel truly bad for Mappa, because they were doing a great job of picking up after WIT). The series had already been declining badly during the final arc after choosing to shift to glorifying the Cringevengers, as if Isayama and his editors/overseers lost the nerve to take Eren's morally challenging justifications to their ultimate conclusion; but only because I'd rather believe the story wasn't always meant to be that ridiculously perverse and stupid.
Anyway, after seeing the leaks I didn't even read the last chapter, stopped watching the anime and didn't buy any more of the books or blu-rays which I'd collected pretty much all of them to that point-- all of the main series and even most of the spin-offs. I didn't rage post or join the AOE (anime only ending) Hopium squad, just completely cut ties and decided I'd never waste time or money on that topic again.
The 100; I didn't watch the last season since it's not on Netflix, but after reading about it I decided the series ended after season five, while season six is a half-decent epilogue and season seven never happened.
