So future Aizawa just wanted to talk, but somehow it became about replacing present Aizawa and she just went with it lol
It seems even she was still able to fix things after the war
Dude was trying his hardest not to see his childhood friends as something else, then they started to give him strong signs that he might not be able to keep on seeing them as just childhood friends. He was confused, keep things as always or clear his feelings, he was recommended the latter and...
The author could have made the mc into a psychopath or something like that, but no, even though he's going to kill everyone in the ship let's make sure he still has the higher moral ground by making the humans evil.