You’re right - it’s far too common, and serves an objective of ultimately turning young people away from education, while not getting to learn what was possible for them and isn’t heir lives.
Maybe it’s a feature of industrial education - enable creation of compliant adults where bullying is disproportionately allowed by tolerating it, and also build bullies to manage future compliant adults.
Bullying is everywhere including in the ranks of teachers and leadership in a school. Those who play the game of bureaucracy (bureaucracy must survive at any costs) must concede to enabling a system of too often failing upwards while standing on the capable folks.
Too many schools abdicate their responsibility and hide behind doing their job and turn it into a daycare of expecting children to figure it out on their own.
Bullying too often is toxic parenting coming to school.
Standing up for one’s self in the right circumstance, especially when the leaders, institutions and experts in our lives, especially as children intentionally traumatizes children that the world is like this, and because it doesn’t bother teachers or affect them it will only get so much attention.