>>4033500I thought it was handled pretty well. There are times when his situation is played for comedy, which is an unavoidable consequence of Matsui starting his career as an assistant on Bobobo and being a gag mangaka at heart. He's even more extreme with this in nigewaka, frequently turning the horrors of war into dark humor. And he's pretty even handed about it. Bitch-sensei in particular is a full blown joke character in spite of her tragic background. And in nigewaka both Mima and Natsu have jokes about their difficult lives made at their expense. If anything, he's actually slightly more respectful of boys. In Nagisa's case the jokes are used to make the audience feel bad for effectively taking part in his abuse once the details of it are revealed. And he did something similar with Tokiyuki.
And that reveal is taken very seriously. His mother is treated as being completely unreasonable and wrong and Nagisa's resultant trauma is treated as very legitimate and damaging. In particular, the "learning to read people's emotional states and erase your own presence to avoid upsetting them" thing is such an accurate and relatable shounenification of how it is to deal with shitty parents that Matsui must have either personally experienced it himself or be very close to someone who has. My dad wasn't even a tenth as bad as Nagisa's mom and it still made me hypervigilant and self effacing.