I find the mass downvoting some people are doing for the comments of people who want more routes, endings, endings, and/or bad/dark(er) endings in this game to be utterly bizarre and kind of sad. I get not wanting the endings personally, but some people wanting them personally shouldn't be cause to mass downvote basically anyone who wants bad/dark(er) endings and/or etc. People can have different wants/opinions than you. I don't think I have ever seen a bad comment sections on itch.io look like this before.
You do realize bad/dark(er) endings can exist w/o NTR, right? There being bad/dark(er) endings is a huge staple for a lot of VN's, choice your own adventure stories, time travel stories, stories that focus on the butterfly effect, and/or etc. And a lot of the time, those endings have no NTR involved. Again, I can get not wanting NTR, but again, bad and/or dark(er) endings can and do exist w/o NTR.