Lmao, the petty ass shit Snape said to these kids did NOT stay with them for the rest of their lives. Harry got pissed about it, because it was unfair and, like, who wouldn’t be pissed, but did he take any of it to heart? Not really. He knew Snape was just being a dick, and chalked it up to Snape’s personal issues (until SWM, but that’s another can of worms). Neville was intimidated by Snape when he was young, but he also marched his ass into the dude’s office to steal from him without batting an eye just a few years later, so like, I’d wager he was pretty over it by then. Hermione was over the tooth comment by the end of the day and went back to her regularly scheduled “defend the teachers, even the mean ones” mantra pretty quick. No evidence of trauma to be found. Harry named his kid after the guy? I mean, yeah, Snape was wrong to use his status as a teacher to bully kids, but acting like he traumatized any of them and Sirius was... somehow better because magic can heal bones doesn’t, uh, make sense? Not to mention that Sirius literally did traumatize Snape, let’s just ignore that one, and yeah, Sirius was shit to Harry too. Not only did he deliberately make him feel bad about not being as reckless and ‘fun’ as James, he also tried to play off his involvement in tormenting another student, which, given that Harry has been on the receiving end of people like Sirius thinking it’s okay and fun to hurt people, this is like a goddamn slap in the face, and is its own form of emotional fuckery.