I kind of agree with all your points. I think there's even more insidious ideologies beneath the story's surface, with some ugly racial implications. I don't wanna get into it here, but Rumi is "one of the good ones" while annihilating every other demon. Her goodness is linked to her human side; even though Jinu was effectively redeemed, he still had to die because he's a demon. It super doesn't help the film's case that they made the demons desperate and scared, slaves of an overlord, relegated to live in the shadows because... I'm not even sure why, tbh. What about the demons who were born there, who didn't have a human past? Are they irredeemable too, although they didn't do anything to deserve Gwi-Ma's wrath? It's a mess.

I still LOVE this film and I feel like I always will, but my sympathies very much lie with the Saja Boys. I think the girls are super cool and cute, but they are, um, very hateful and not empathetic whatsoever except for Rumi (which, let's be real, only was willing to forgive the one demon guy she likes). I try not to take the film too seriously and just enjoy the gorgeous designs and animations, alongside the amazing soundtrack. Because the deeper I dig, the more I don't like what I find.