I've always been curious how so many identify as Slytherin.
The perspective of the books is skewed in favor of the protagonists. That doesn't mean all Hufflepuff's are doormats, all Ravenclaws are nerds and all Slytherins are bullies. It merely indicates that this system works to create a tribalistic mentality just as most other means of dividing people by arbitrary measures often does.
You nailed the point I was trying to make earlier, that's exactly why I hate the Houses so much. It's so arbitrary and forced on witches and wizards unlike a fraternity or sorority, and yet it becomes such a big part of their identity. I don't blame Slytherin students for becoming villainous when they're treated like they're always destined to end up that way by the sorting hat and faculty of Hogwart's.
99% of Slytherins are good patriotic wizards like you or me, but there is that 1% that gets all the focus a lot of Slytherins are extremely brave and gave their lives fighting against he who must not be named. Severus Snape for one, was one of the main heroes of the 2nd Wizarding War and was probably one of the bravest wizards in the war.
Snape was an incel whose only gripe with Wizard Hitler was the he killed the girl he was horny for