Meanwhile, Neville doesn't follow instructions and creates a concoction so potent it melts a cauldron and burns holes in other students shoes, along with himself being covered in painful boils.
Being called an 'idiot boy' in response is tame in comparison, especially considering the circumstances lmao.
Like no shit he's gonna be strict when fucking up a potion can cause that much damage and more like??
ETA: That is literally all Severus does in that scene btw. Aside from ordering Seamus to take Neville to the Hospital Wing in post, and then chastise Harry for not keeping an eye on Neville (which, it was wrong for him to single Harry out, especially with the baseless assumption that he was purposefully not aware of his surroundings for his own gain. But on the other hand it is a sensible lesson to keep an eye on those at your table - especially in a potions setting. Same lesson could have been acheived in a better manner though).
ETA 2: Also thinking about how *little* points Severus takes in that entire class. *Two* points. When he's already been "established" by Ron (going off word of mouth) that he favours Slytherin and can be nasty.
ALSO the way Malfoy being praised is framed as favouritism, even though he's just good at instructions and happens to be in Slytherin like??
And *this* is way you take Harry's narration, especially early on, with a grain of salt because *he is a child and doesn't have a full grasp of everything to understand in a non-biased way*. He's an unreliable narrator (as is expected).