I finished the film just now. I regret to inform you that I was (almost) wronged. It was just begrudgingly mediocre, which might be an A++ according to Netflix. I find it funny (and surprising from a Sony film) how there were almost no big-lipped Africans nor Arabs nor Dalits within the setting. Then again, the same could be said with most animated Asian idol movies. Gookpop listeners (horny or otherwise) need not apply; there's "subtle" fanservice for fans of boy bands looking like mannequins. I got what I expected from K-Pop Demon Hunters, although this felt like watching a modern musical but with an odd framerate. There's not much that's being desecrated except maybe some traditional Korean values. There was even a tragic romance thrown in later. The real tragedy is the fact that this is the one of the very few original animated films made this year that aren't based on some prior IP nor adaptation.
Only Sony and Netflix can make demon killing look insufferable. Just make it Korean and lower the framerate. The gookpop is the cherry on top.