Unpopular Opinion: Ugetsu did nothing wrong!

Ugetsu shouldn't say sorry for loving the violin and being a genius at it. Kaji viewed Ugetsu as a rival at first and at the same time was inspired by Ugetsu's music. When they started a relationship, Kaji's views didn't change. Kaji was always jealous of Ugetsu's natural talent yet at the same time wanted to cage him for himself. And because of that he kept holding and leeching onto Ugetsu, eventually Ugetsu felt suffocated and his music started to suffer. Ugetsu shouldn't sacrifice his passion for anyone.

Now I can only feel bad for Ugetsu. Because not only was it a toxic relationship, Kaji isolated Ugetsu. They both had no friends and both their families are distant. And sure they both slept around. But I view it as cries for help and wanting to give the other person a reason to run away. But because they were so deeply isolated with each other they could never open their hearts to anyone else and couldn't leave each other.

Had Kaji been supportive since the beginning and put his envy aside, they would have had a perfect relationship. At the same time, Ugetsu noticed early on that Kaji was building resentment towards him and could have just spoken up instead of just saying 'lets break up' without any closure. Because of that they held on for 2 more years. But now Kaji has a band, Haruki and a solid support system. I get Ugetsu's anger: It's not fair. Their unhappiness started from Kaji, so why does he get to escape and be happy first? In the end Kaji got what he wanted: he robbed Ugetsu and defiled his music. Ugetsu can finally be free now, but it sucks because he knows he's now truly alone and that's scary. Remember that chapter where Ugetsu oh so casually tells Mafuyu the reason he's telling him his backstory is because he has no friends. The way he just accepts having no one and being in this situation is so sad.

... That said it's hard to hate on Kaji. They met in high school, were each other's first love and it isn't surprising that they both had moments of immaturity that just built up over time.