
Normally I would get annoyed with a main character that is so self loathing. But her anger and resentment is humanizing. And yes, she shouldn't lash out, but its realistic. I feel like a lot of times stories hyper focus a characters sadness because it easier to look good then a character being angry and lashing out, which is also realistic.
Spoiler
And she is in the right to go off on the white haired girl. She told her multiple times to go away and not touch her. Obviously beating her up later was a bit much, but pushing her away was justified. Also it seems like the white hair girl is either dumb as hell, or trying to push her buttons. Almost like the brother does.

I don't mind crazy male leads / love interests. But sometimes I dislike when they are getting down and dirty they ignore there partner saying it hurts after minimal prep. Especially when they starts crying because of pain.
I even remember a popular one where the bottom started bleeding downstairs and why sobbing and the other guy found it hot.

Then u dont like crazy leads u like possessive leads.
Crazy class generally means "crazy about u no matter ur will" ur their world whether u like it or not.( ̄∇ ̄")
The worst thing u can read is a crazy possessive seme/uke.Σ(  ̄□ ̄||)
They are a threat to EVERYONE. A straight crazy would still give somewhat of a fuck about how their perceived publically but possessive crazies dont give af ╥﹏╥
THEY are truly horrifying sometimes.

I liked it all the way up to the assault. I get it, the one did is a psychopath, but holy shit that was fucked up. He didn't need to do that, and it didn't feel satisfying for the other guy to come back to him so easy. Even if he is a nice guy. Like its well done, but I can't get over the ick not being resolved well.
Why does the white haired girl feel so entitled to the female leads life? She not even related to the family or adopted. Couldn't she just use the energy instead to go marry a noble or something? Seems easier imo
Short answer: she's completely delulu but her goal is to cement herself in the highest position possible.
Long answer: she's a narcissist and classist. She thinks she deserves it for suffering the family she was born into and that she's destined for greatness. She sees the MC as someone undeserving and someone who squanders her position in life, aka she should have been the stereotypical evil rich girl she emulates behind the mask instead of looking like a happy airhead. By seducing the men, she feels she's going up the ladder and she'll eventually get what she deserves, which seems to be everyone's attention and perhaps she can even drop her facade. She sees men as tools and pretty women as obstacles she has to "cunningly" eliminate.