I like tho that the author didn't excuse the things they did, especially for Eno. Like he knows he'll have to live with what he did forever, but I think it also shows the pervasiveness of trauma and the amount of strength it takes to break such a vicious cycle. In that way I think Atsumu was probabky the strongest character, and then Azusa who was touched by his kindness. I think for all of them living their lives now, it's less a testament of "they get to be happy now despite what they did" and more of a "we have to keep moving forward and not live in the past" or else they risk projecting their trauma onto those around them. Seems also like Eno and Kagura started beong advocates for SA survivors, so I really liked that detail. As for redemption for the rapists, I don't think you can ever redeem yourself for that, but they did grow as people and will probably never do that again or let that happen again. Man this series is so good and nuanced and also horrifically twisted. Too bad it's so dark cuz I can't go around recommending it to everyone willy nilly.
Remember when Karino pushed him down a flight of stairs, blindfolded him and raped him? And now they are happy together. Lovely.
As for Eno, he had rape trauma. Can you imagine how many people he caused to get raped though? Not just raped but gang raped. So what? The cycle of abuse continues? Fuck that. Have some empathy you bitch.