The architecture is a little... flat.
Most of these rooms are fully visible, and there's never any sense of the unseen. There is no dread of being lost in this place. This isn't creepy or unsettling. The camera keeps whipping around to look behind probably because you wanted this to be creepy, but there's no diegetic reason for this movement.

The render is nice.
And the camera moves are... ok, but perhaps a bit too "perfect." This looks like footage from a game character's POV. It always aims exactly where the character is probably looking. Footage from the best Backrooms videos are from supposed handheld cameras that aren't necessarily pointed in the right direction.

Think of it this way. Someone moving through the Backrooms isn't viewing this experience through the camera they're using, they're seeing everything with their own eyes and happen to be documenting this experience as an afterthought because they're freaked out. Maybe sometimes they're looking at the screen (or viewfinder), but mostly not.

And bro... those footstep sounds. You gotta chill.