Rather: Classic "I have no reading comprehension".
Where do you see a "tragic past"? The flashback outright ends with him making friends with who he thinks to himself as the devil.
The flashback showed that he never could control his temper and that his new best friend made sure he could lash out all he wanted with no lasting pushback.
The asshole teacher sort of kept it under lock by beating him down, but was driven into suicide by lil'devil.
?so the teacher getting abused when he was a kid is not bad? why would i say that to kunigawa? for him its normal to beat people
ill humor you on kunigawa, so a child was being beaten up to “lessen” his violence streak instead of meeting good people
you sure you’re not the one with no reading comprehension? again a child was getting beaten up to “fix” his behavior
the teacher kept it down? lol he just made it worse, kunigawa is still doing it despite the teacher beating him up
tragic doesn’t necessarily means his family was killed, got his house burned down, betrayed by his best friend and got left in pathetic state