@auodere
I don't think that's the issue here. Chako hate is a stretch but she is making mistakes that someone in her position (Reiji's best friend) should not be making. Thinking at all about Nagi is one and detracting from the real problem. Nagi is without a doubt the catalyst to Reiji's thoughts and he should stay away. She sinned and acted irresponsible by opening the door. However, the man who wants to walk through it is standing in front of Chako, and Chako doesn't understand him. She doesn't know what Reiji wants or why he feels that way, despite being his childhood friend. And we know why this is the case:
Even now Chako made him contractually promise to not see Nagi. Keyword "made", Reiji wasn't given the choice to consent. She forced that ultimatum on him when all he wanted was for her to stay away from a manipulator with a confirmed record of suicide entanglements. Without him, Chako's life will not be threatened. Chako herself knows Esemori is a bad person but went to him because she felt helpless watching Reiji with Nagi. The reverse however isn't true. Whether Nagi is there or not will not affect Reiji's suicidal impulse. She is a non-threat so mentioning Nagi at all as an equivalent to Esemori lends the impression that she views Nagi as the source and propagator of Reiji's instability. Why would his childhood friend think some random idol could convince him to commit suicide if she is at least partially aware of what goes on in his daily life? Why not call Reiji out on HIS problem? To me at least, Chako has made active attempts to avoid the elephant in the room, or is otherwise distracted. This chapter proved that he would go off and die on his own because he feels his life is that hopeless. Chako got the top 2 biggest reason for that despair involved.
Gen is the reason Reiji wants to escape in the first place. Reiji would want anything BUT having Gen in his life. Chako is not stupid, but she was desperate and didn't want to lose him. Possession and control is the biggest recurring theme and Chako is sinking into that pit. Reiji brings out the very worst in people and it's finally starting to show.
Let's be real here. Chako's his friend. She's not evil. She's not a bad person. She's a very good person, if a ted selfish. She is the best influence in Reiji's life and that is a fact,
but that is also changing as she continues to conflate what Reiji wants/needs for what
she wants (this extends to her perception of him). And unless they talk about the source of his problems, this will only get worse. Everyone in this manga is poisonous to various degrees, whether intentionally or unintentionally. And even when they offer benefits, their intentions are morally compromised. It's just a matter of how quickly they realize it and how they choose to express it.
I love this series so far.