I'm 30 minutes in and....
...I'm contemplating watching it til the end just to watch Mrs Paley get killed.
I think I would volunteer to enter the Hypercube, just on the off chance of bumping into the old woman, so that I might murder her.
I'm not sure if it's the actor or the script or possibly both, but I don't think I've ever disliked a character quite so much before.