Not sure if you were here when the game was released but the NTR hate crowd was so annoying that the mods had to delete dozens of posts (i think the thread even got locked for a few moments for the clean up) crying about it and they kept checking for more infractions later. Despite that you can still see a handful of those forumites facepalming posts talking about the genre despite those people themselves not posting here anymore. So no i do not believe most of them can be reasonable.
You are right that I did not see the 1.0 version of this game, just found it with the most recent update.
Did the first release have NTR? And was it broadcast in the tags beforehand? Generally when people complain so hard to get pages upon pages of comments stricken from the record its because people have a visceral reaction to something unexpected. Not saying some people aren't just assholes because they don't like something, the internet proves that, but most of the times I've seen threads explode it is because of a main fetish (NTR) not being telegraphed to people beforehand.
Also, minor correction, I did not say most of those people can be reasonable, I said most reasonable people would leave if a Developer was upfront about NTR being the main focus of their game and the Dev would only be making a token effort towards a non-ntr path.
I've mostly seen ambiguity about polarizing fetishes like NTR being the driving force behind that level of player's Ire. Plus, I'm sure you can agree here that there are unreasonable people on both sides of the NTR/Non-NTR debate.
Because even with avoidable NTR there are still whiners. They're probably scared to follow the NTR route by "accident" (with the choices they made)
I don't quite get your animosity towards those who'd prefer a clear cut warning about content that is polarizing.
Many games that feature NTR have warnings or even If/When switches that turn NTR Content on/off so that people who want to experience that content can play without worry and those who do not want to experience that content can play without worry.
I mean, how many games warn people about Golden Shower content? Its the same thing (IMHO) with NTR, a niche fetish people should get a choice on if they want to experience it or not.
Plus bitching about people choosing choices that make characters more sexual and then getting mad over it leading to NTR instead of said character having sexy times with the MC is a bit much aint it? I mean, how many games encourage you to get close to a Love Interest and inspiring their lust so that said LI will be more lustful towards the MC? The important part is the telegraph where choices lead to when they lead to something as devisive as NTR.
But these and more are "well, you know, that's just like uh, my opinion, man."