If Backrooms has you craving more liminal-space nightmares, Vivarium (2019) is worth watching. It follows a couple who, while house-hunting, are lured by a creepy realtor into a neighborhood called Yonder, where every street and house is the same and escape seems impossible.
@TylerGlaiel Most lars von trier films, all hard to enjoy but once you understand that he wants that you can see the beauty of defeat and rebirth that comes with the films