You said "blackmail, bullying, and rape" so I asked what the "bullying" was. Yeah, she blackmailed MC cause she was concerned about her identity getting out, id probably do worse. I mean let's say you were undercover with the yakuza, would you be fine sending someone along with a pat on their back without assurances that your secret is safe? Is it right? nah, but it's understandable. Also, I didn't really talk about sex scenes (chika is better without the sex scene), in fact I mentioned the more affectionate ones, hand holding, hugging , and her wearing mc's shirt lol.
as for chika, I only brought it up in case you hadn't seen it, but its up to the player if they accept it. Personally I am just doing it as a friend atm. She didn't seem to care about MC's sisters drama when she stood up to those bullying her, it would be a dick move to not help her as a friend at least because she's a "prostitute" and has drama lol plus it seems helping her will help the sister (i can't remember her name). Right now Chika is more just a friend MC is trying to help out after she helped his sister... yuka?
In the end you don't have to like who I like, I have just wondered why ppl dislike Ayase because she is my top 2. Hell I can even ignore the the non consensual finger blasting because Noa has tried killing her 3 times lol but hopefully dev makes it avoidable, at least for ppl not on ayase's path, so ppl don't have it forced on them.
p.s. This is all just a long discussion, I'm not trying to convince you of anything, just getting your take and giving you mine. We completely agree on Miharu at least. That and I do prefer the more romantic avns over sex sex sex. And well Ayase is just my type... like kind of enemies turned lovers maybe, or maybe the idea of saving her or 2 ppl saving each other idk but I totally get why ppl might not like her. Something about her path appeals to me though.