Doesn't HP end up a literal magic cop at the end of the series? The whole caste system is also upheld throughout, at no point is revealing the wizarding world to muggles even considered an option despite the fact that little kids are dying from cancer all over Britain/the world that could be magically healed in an afternoon. The whole SPEW thing is just profoundly racist and always has been. "Cho Chang" – nuff said. The whole point of Hogwarts is that it's a boarding school, which proudly inherits all its real-world British characteristics which are intrinsically linked to the more problematic parts of the British class system.

Rowling has always been a bigot and I will die on this hill. Any progressive messaging that people read into harry potter is at best performative (for instance yes she explicitly denounces "blood purity" pretty early on, but that's super performative considering her entire worldbuilding is built on the premise that some people are just inherently magical and others are inherently not invited to the party. "Blood purity contests" are only bad when wizards to it to other wizards.).

I don't think she's a good enough writer to have done most of the racist/classist/misogynist messaging intentionally, but nonetheless her reactionary poorly thought-out world view transpires through every bit of her writing.

EDIT: Trying to expand on my own thoughts here. I've always despised HP as a franchise so to try to be fair to HP let's contrast and compare with the piece of shit author who did make a book I like, Ender's Game. I pirated it a couple years back, and I won't pretend it's not obvious at times that he's a homophobe and a religious nutcase with some obvious cognitive dissonance with some of his (at least at the time) progressive views. I guess the good thing about that particular IP is that there's no new stuff coming out besides one awful movie, so everyone can agree Orson Scott Card can get fucked and move on with their lives. But it's important to acknowledge that his religious zealousness did impact his writing and to take a step back even if we decide to still appreciate his work.
The problem is that HP fans are in a much tougher situation because the writing just isn't good so if you drop the flimsy pretense that 2000s Rowling was a champion of liberal ideals, then you really don't have much left besides a profoundly flawed worldbuilding with shitty characters who only work to uphold the wizarding status quo. Yeah I'd get pretty mad too if I had spend my teenage years obsessing over that heap of trash.

uh... did we read the same books?

house elves are a literally and explicitly a chattel slave race.

the sole character who goes "hey slavery bad" and tries to do something about it (Hermione) is made out to be an ass for bothering to advocate for them, both by the other characters and the narration itself.

the one house elf who even wants freedom (Dobby) is made out to be a crazy person for it.

THE "HERO" (Harry) INHERITS AND KEEPS A SLAVE (Kreecher).

and it's supposed to be fine because "see they like being slaves, it's what's best for them". which is literally what u.s. slave owners used to tell themselves, that it was morally right and good for the slaves.

Harry Potter is absolutely and unequivocally pro-slavery on the surface.

that's one item from the list you're moaning about being "blatantly untrue" that is not only absolutely true, but so blatant that any idiot can pick up on it. the narrative clubs you over the head with it.

if you bother applying a VERY FUCKING TINY amount of critical thought to your analysis the classism, blood purity, misogyny, and more come to light. it helps to understand a few things about these issues in the real world, and it's not hard to understand those either provided you stop assuming you know all there is to know and take your fingers out of your ears.

how about instead of just knee-jerking about books you clearly didn't bother thinking about beyond "yeah, go good guys!" you try to understand why people say these things are in there. because all of them totally are, they're shitty books stuffed chock full of shitty worldviews and shitty bigoted messaging, thinly veiled by shitty plot contrivances because she is a shitty person and a shitty writer to boot.

Agree with you. You could take most fantasy stories ever written and apply the same "injustices" wrongly so. I call that reaching.