I'm inclined to believe that a story's ending doesn't ruin the story AS a whole. The beats and build up and plot and moments are there and legitimate. The experience before the disaster of a conclusion: that still very much exists.
YOU DON'T UNDERSTAND, I DID IT BECAUSE I WANT THAT HELLA PUSS PUSSmate, fuck 130+, that shit basically ruined everything (yes, the manga. I'm talking about the manga which I assume you're talking about.)