It works like that for ME, that is my personal preference. I am not attracted to weak / meek girls that I need to protect. Weakness and meekness are repulsive to me. When girls show weakness, cry, sob, are vulnerable etc. I lose attraction to them. A little bit, sometimes is ok, we are all human and sometimes we can be weak, but in general I like strong stoic women. Haley going from this playful cool chick to a traumatized girl is a big turn off.
While I don't agree with the conclusion about Haley (I don't see her as weak or meek at all, she's a top-tier brat), I can relate with this. A cutesy/doting woman (much like Sandra) will make my balls shrivel. I don't want to be worshiped, and would want an equal partner.
As for Haley, in my playthrough I only learned two things about what happened with Klaus; He manipulated her naïveté to escalate physical contact (the kiss, and his head on the girl's lap), and he "hurt her". We also know that mom put a stop to it, and has a very low opinion of Haley.
Connecting the dots (granted, there isn't much to work with), I suspect Klaus groomed Haley, eventually raped her (hurt her), then normalized what happened with the excuse of them being in a relationship, and it being normal. It's possible that by that time, Haley was fully convinced by Klaus that she seduced him. The 'three weeks' that are mentioned likely don't include the time Klaus spent grooming her, but only the time Haley considered them to be in a sexual relationship. Their mother found out, and blamed Haley as well. Either by Haley's own admission, or by being convinced by Klaus, in her mother's eyes, Haley was guilty.
There's no doubt in my mind that Haley (learned to, or at least partly) liked what was happening with Klaus. Haley loves being manhandled and used sexually, I'm sure that Klaus did plenty of that, and even introduced her to the concept.
Haley's abuse seems to come out of nowhere because it was never framed for the audience. She tells the MC that her teacher was her first lover, and he immediately infers that Haley was groomed and abused. At that point, we, the players, don't have to believe that conclusion yet. Although technically rape, it's still possible that no grooming happened, and that Haley did, in fact, seduce her teacher, and she actually had a crush on him. (She did seduce the MC, cheating on her lover and Sandra, while it being taboo as well, so this isn't far-fetched.) We never saw Haley get triggered, retreat or being vulnerable, instead we get this brat who's jealous and possessive of her brother (insults his look and negs him when he goes out with Sandra, then compliments him when he goes out with her, as an example). It's only after meeting Haley2 that we (the players) are relatively certain that the MC's conclusion is the correct one.