Even before phones schools were like this. But they'd just put you in mandatory extra classes to fix your grades. Instead of, you know, talking to you. To get to know how you are doing and how you're feeling.

I've hated my school time and all it taught me is teachers are obsessed with having power over others. Maybe not all teachers, but a lot are like this. They won't listen to you, they just force their opinion on you. And if you don't do well in their pre-made lecturing framework then it's on you because you don't pay attention and you are lazy. It's never on them.