The MC himself is a rapist by the legal definition of the word given the stuff with Ada (minors can't consent). Honestly my biggest issue though is the MC's constant gaslighting with his wife on the harem route and the way he emotionally manipulates and takes advantage of the younger girls, yea everything works out eventually because that's the way the author wrote it, but the characters are (as usual in these games) so terribly written it's cringe as fuck. Like none of the females are even close to a normal human being, and the MC is a manipulative asshole beyond belief. By the way, you could write a story with realistic women in a polyamorous relationship - they do happen after all - I'm just becoming more and more convinced nobody on this site has that capability. Instead they just write every woman as being completely obsessed with the MC regardless of any action they take, and the MC's all as highly manipulative men that for some reason are cast as a hero.
In short the MC does the follwing:
Gaslight the shit out of his wife (and of course, cheat on her with 4 other girls)
Sexually molest his young daughter when she barely understands what's going on
Take advantage of a young woman having just gone through a rape instead of getting her proper mental health care, all while cheating on his wife.
And other more minor (but still obnoxious) manipulation of his older daughter
Honestly had to skip most of the dialogue on this one and play without the incest patch (once I realized just how bad that patch was in this case).