Ngl this felt kind of mid. Dude was unlikeable way before the girl was and so the fixation on making her monstrous via appearance before all the details were revealed felt super shallow. I suppose it could be argued that this was the whole point, but I would have preferred a kicker ending where we get someone else's PoV, maybe a bystander calling the cops, with the girl looking normal, strangled to death on the ground; without that, it's almost like the dude was shown to be justified in killing a monster.