Copper's behavior during school
As a child, he was a bit of a bully. Just a little boy pushing around other kids whenever he didn't get his way. Because of this, even at a young age, kids just didn't talk to him. He changed from being a bully to just being a weird unsocial kid growing up.
Copper isn't a perfect student in the slightest; he turns in late work at the last minute, he falls asleep during class and misses out on lessons, he fights with other students and comes out of those fights with bruises, and he absolutely cannot focus on any of his work; this is all due to his neurodivergency and physical abuse happening at home. He acts out a result of it and doesn't care about school as a result too; as he constantly skips classes during his senior year and does whatever the fuck he wants around town.
Teachers try their best to be friendly to him, but he makes it hard. He's a troublemaker and terrible student that doesn't see a point in anything. While there are definitely teachers who dislike him and make their dislike of him apparent after a while, there are also teachers are very concerned about him and what could be happening at him to make him act this way. They're also greatly concerned about the bruises that form on his skin so often.
Students don't talk to him and he doesn't talk to them. He doesn't know how to approach other people without seeming awkward or lame or like such a loser who's so unused to social interaction. It's... Not like he dislikes the idea of having friends. He just doesn't like his options and they don't like him either.