I haven't played this game, I just found it when something I was reading on the internet referenced it. I really understand where you are coming from with the critique if what you are saying about this game is true; however, I think maybe you are ascribing motives to the author that are not really representative of their intentions.
Specifically, I am wondering if it has ever crossed your mind that this VN/game was written by someone who did a little market research, and understood what kind of story was most likely to be popular amongst people who routinely pay money for Adult VNs?
It seems to me that you are making claims about the type of person this is, and what his or her feelings about certain types of real life sexual relationships actually are; and here is the last thing I will say... while I do not normally point this sort of thing out to people, even if the content of this VN represents a real sexual fantasy of the author, you seem to be just fetish shaming.
For example, there is a lot of robust academic research that suggests that a significant number of women--and we are talking about a large percentage--have sexual fantasies based around rape or non-consent. By extension to how you are acting here, it seems like it is your position that merely having that fantasy means that they condone rape beyond the realm of fantasy. This clearly is not the case, and with this in mind I sometimes find it extremely problematic when I encounter people who judge people so harshly for sexual fantasies. Just my two cents.