Experience Tumblr Like Never Before
Severitus where Harry is deeply hurt/affected by Severus' strict/old-fashioned/etc parenting styles.
Severus is always portrayed as strict, sometimes bordering on straight up abusive, but then because he's better than the Dursleys, readers and authors alike tend to agree that it's okay. (IF THAT'S WHAT YOU LIKE, THAT'S FINE SO LONG AS THERE'S A DISCLAIMER.)
But arguably, most often, his tactics are rather harsh. Maybe he's firm on the whole open door policies, or washing mouths out with soap, I've seen a lot with spanking as well, but there's never any after effect, so make there be one.
Oh, he washed his mouth out with soap? Now he's scared to talk.
Spanked? He doesn't see the difference, frankly I don't either, though, so I don't have much to offer here.
No door policy? He feels watched.
Whatever you decide, there should be a point of realization that this is harmful. However that decided though differs.
Make Harry write an essay about Scary Things, and instead of writing about something normal, he writes about how he's terrified of messing up.
Maybe Severus discovers a diary.
Or, and something that I find worked with their personalities, is a massive fight. Harry messed up, and now Severus is threatening whatever, and Harry loses it. "I want to go back to the Dursleys, because at least I know they're cruel, with you it's a mix up."
It's so angsty, om nom nom nom.
Whumpee just went through something terrible and doesn't want to let go of caretaker, literally cannot stand to be outside of their embrace since they were rescued. For some reason (you decide) they need to be taken away or out of their arms. Whumpee is screaming, sobbing, maybe even ripping out their hair or acting utterly hysterical, doing anything to get back to them, because that's their safety.
Caretaker is trying to calm Whumpee down, trying to get them to understand that they need to go or need to let go, but they can't.
The best example I have of this is in Infinity war when Peter is begging not to go, clinging onto Tony.