there are occasional hints that Rowling is making a contrast with wizard society and Voldemort's followers, so I know what you mean. It's an inevitable contrast to make in the first place, there's always going to be a "we're not so different" moment in the kind of genre fiction she was going after. It happens in Star Wars and Lord of the Rings too.

But what's really interesting is that it doesn't go anywhere. Usually the hero overcomes both the villain and their own shortcomings to become something better than either, but that doesn't happen. Very direct contrasts are made too, like Harry being a chosen one, how wizards treat goblins and elves, how wizards are resistant to change. It's shown their bureaucracy isn't above wiping memories or using outright torture by putting people in a prison with monsters made out of depression. Even as a kid that's what I thought the point was, to show wizard society and Voldemort were two sides of a dying system that Harry was born to overcome. I was a kid but I was familiar with Star Wars and that was Luke's general arc.

Except it doesn't go anywhere. Harry sticks to his liberal pacifism and defeats Voldemort on a technicality. Wizard society goes back to exactly how it was with no changes whatsoever, nor is any comment spared on it. Voldemort is considered a strange anomaly rather than the inevitable conclusion of allowing Slytherin to exist. And all of that despite earlier books saying outright that Voldemort and wizards like him had been festering within wizard society for centuries, building up to this moment.

Fuck JK Rowling