This is much worse than Snape's behavior in the book series.
First, I want to ask you something: remember all the moments in HP where teachers came to Snape to stand up for their students because of bad grades or his behavior in class, or parents of children who suffered from injustice from the potion master.
What? Not a single one? Oh, here's where I want to ask a question to all the people who write a bunch of condemning posts about Severus: did at least one of you notice that almost all adults treat Snape's teaching methods as something normal?! This situation makes me think of the parents of Hogwarts students in the most negative light, as if they responded to all their children's complaints with something like "Oh, he's a normal guy. When I was a child, teachers would kick us and put out cigarettes on our backs for the wrong answer. Snape, judging by your words, is generally very kind - he just takes off points and assigns detentions. I have no idea what you're complaining about."
In fact, there is only one word that characterizes the real attitude towards children at Hogwarts - "indifference". Teachers care more about each other and in general it seems that the main thing for them is that the students simply do not die (and even then they miraculously manage to do this). Do you understand that if parents complained more often about Severus' behavior, if his colleagues stood up for their students, if Dumbledore condemned and insisted on changing teaching methods, then Snape would hardly have behaved like that in the book series? The worst thing about the Potions Master's behavior is not the way he treats the children, but the fact that he has been given carte blanche to behave as he pleases, while the students themselves have rights barely higher than those of house elves.
Severus is, without a doubt, a bad teacher, but he is surrounded by worse people - colleagues and parents of children - who, with their tacit consent, have given him almost absolute freedom of action and who, by their inaction, express no less hatred for children than Snape himself does in his lessons.











