That sounds pretty subjective to me. If you don't like it you don't like it, personally I think it's extraordinarily good and I feel like it was written that way on purpose. The brother was not forgiven, he was offered help. Huge difference
Of course it's subjective, it's an opinion—same as you liking it and thinking that it's extraordinarily good. And the ending had an atmosphere that made it feel like all is already okay because he said sorry and they hugged it out. It feels forced and rushed.
I know i know, its just the way you straight up called it "not good" that kinda rubbed me the wrong way. But I respect that. The ending was indeed really short, maybe it's just me that wasn't really bothered by it at all. To me it didn't feel like "all is okay" but rather just a hopeful "it will be okay". That's why I liked how short it was because it's basically just the beginning of their future
He wasn't fully forgiven imo. Most of them are still angry at him, I suppose it's just for Kanami's sake.
I have issues with this story. The concept is really good. The reason I even started reading this is because I got intrigued but as I went on, I kinda noticed that the writing isn't really that good?? So many things are brought up but then immediately resolved or immediately forgotten. It's not a bad manga per se but it isn't good either. And the conflict resolution?? Really??? It's good that he said that he's gonna get therapy but I don't like how he's immediately forgiven because he hasn't earned it at all. It also doesn't help that his "redemption arc" all happened in one chapter. I'm kinda disappointed with this, really. I remember starting this series years ago and I had high hopes. But I am glad that this didn't go to any romantic route because I would be just so mad if that happened.