I know there's more bnha, but it simply doesn't undo Midoriya saying over and over again that he won't kill Shigaraki and him then killing Shigaraki. If he wouldn't have gotten the title greatest hero for it and it was framed like a tragedy that would be doable, but it's not. You can tell it's not because there are people seeing this as something positiv in both fandom and in-universe.
I don't even take too much issue with Midoriya not understanding Shigaraki, he focused on Tenko, but that is a realistic learning step for him, so him not getting why he was still Shigaraki in the end and not Tenko is understandable, even if it's very slow and Uraraka got that way faser than him.
Maybe there is hope, maybe the manga will deal with this, but the handling so far sucks. The solution to: "I want to save him" never came despite it being brought up repeatedly, Midoriya shoudln't be as ok with this as he was afterwards.
I get that with so much one has to deal with stuff like that is never linear, but he killed someone, that should be big, not AllMight already finiding excuses. We don't need another Hawks.
It's just frustrating and it shoudln't be. Tragedies are fine and enjoyable, hero stories are too, but this story that from the beginning had a bright young kid who wanted to do the right thing fail so extremly to only sweep it under the rug right away feels wrong.