This is not a good horror movie.
It follows the basic horror movie plot line, hitting the relevant beats. But fails to deliver a memorable film, and I would argue presents a deeply problematic story. Which boils down to parents being unwilling to raise a child born with a physical disability so they lock her away, and when she eventually gets released after years of captivity enacts revenge on whoever she can, only to be locked up again. All the other story elements in the film amount to nothing, and are tropes at best.
Why do storytellers still use the ‘monster’ narrative to get away with shaming and demonising disability. This goes all the way back to the beginnings of the genre and we should really have moved on and let this go. But we haven’t, so it speaks to the ongoing representation of disability, physical or mental, as something to be afraid of and that is ‘not perfect’ as stated by the character in this film. It’s easily arguable that the film pushes a modern eugenics narrative. Which is deeply problematic.
The horror genre has and continues to get away with a lot, but when so poorly executed you have to call it out.