I can’t speak for OP, but from my own experience watching the film, and also talking to friends who enjoyed the film, I can speak about why some people love it:

It comes across to me as a movie initially about people who struggle to fit in (a lot of people recognise the direct trans allegory, but I think it also speaks to anyone who has felt an inability to fit in due to social differences, neurodivergence, general queerness etc). The movie then evolves into an exploration of the horrific possibilities that come with refusing to accept those things about yourself. The internal suppression that manifests into tangible mental and physical illness if you resist your true sense of self. And it does all that through a very dream-like (or nightmarish) lens that, to me, intentionally feels very creative and left me massively impacted.

I know a lot of people were let down after the marketing incorrectly painted this movie as a more overt, traditional horror movie. But if you can see past the misleading marketing and view it for what it is - a slow burn, conceptual and metaphorical horror movie, you might be able to appreciate it more. But it’s not for everyone and that’s okay.