It is impossible to separate out the transphobia, the homophobia, the misogyny, the quasi-Nazi sentiments, the extreme heteronormativity, and the overt support of child abuse and neglect from the "good bits." What you'd be left with is fragments.

(I mean. Fragments is enough to build fanfic empires, and some people have. But some of us like a bit more canon in our fic than that.)

Rowling has fallen into that pit where she believes everyone critical of her work or her public statements is anti-woman, anti-poor (because nevermind where she is now; she started poor), anti-creativity. And that's not going to change because she's never going to take a break long enough to perceive the arguments from a different perspective.

Other than that... the books themselves are packed with cliche tropes which is why they caught on so well. Mass popularity does not come from groundbreaking, innovative work; it comes from works that resonate with millions of people who agree on nothing but "wouldn't it be awesome if everyone married their high school sweethearts and they stayed married for life."

I don't blame anyone for liking it. I haven't sorted out my own level of "like." But the problematic starts early in the series and just never lets up. The only reason it works at all, is that it's told from a young, unreliable narrator POV--once Rowling speaks up and starts confirming details, that's lost.