I remember when I was in school, many kids who came in who misbehaved weren’t assigned a boutique handicap; they were just called brats. Most often, they “recovered” quickly thanks to discipline — back when discipline wasn’t illegal.
I’m sure there were some who had true mental issues, but probably not the majority.
Let’s be honest okay? Even kids who have “special needs” can misbehave and need their behavior “corrected”.
That does not rule out getting mental health treatment but that does not also rule out busting a butt once in a while.