Honestly, I'm with you there. If you have little to no interest, forcing yourself through those routes can make the score sharply drop by the end or even ruin your overall experience. It's not like you have get every ending/quest/item/line of dialogue in a game to say you "finished" it. One ending is way more than enough in my book (I would argue about skipping your whole way there, but eeeeh I'm biased against speedruns in general so I can't really provide arguments).
People experience games the way they find the best. You either finish enough of it as a masterpiece or play long enough for it to become kusoge. Routes should be DLC tbh then I could buy only the ones I want.
Signed: a completionist that grew out of it because it's damned unworth it.