You may say that, but a lot of stuff showcased in this series do actually happen in real life.
Like, when i was in school, i was severely punished by a part-time teacher (for not doing homework), that i couldn't move for a while (he had pinched my thighs so hard that they had become black).
My parents did make minor complaints with the school, but nothing happened, and i didn't go to school for nearly 3-4 weeks.
By the time i went back to school, that teacher had left the position a few days back, as he had found a permanent job else where.
That part-time teacher was famous in the school for regularly being violent with his punishment on the students, but no action was ever taken (he also once used the "chinese water torture" method on me for punishment using my own water bottle which had a leak when turned upside down, while i was made to do headstand against the wall).
And not just him, even some of my home tutors punished me regularly (they couldn't touch my sister for obvious reasons, so everything came towards me instead). As for my parents, they didn't really complain much except a few times, as finding home tutor was hard at that time in my area when i was in school, and my sister needed help in her studies.
In many Asian region, parents still accept corporal punishment as acceptable in school, and teachers & adults not listening to what kids say is also common, because of the famous notion that "kids lie to protect themselves, so never trust what they say".