Kate Siegel as an actor made no mistakes here.
However,
The doctor’s office is clearly an evil lair and the protagonist couldn’t care less.
The protagonist brings a mountain of evidence to her friend and she is extremely dismissive and defends the doc anyway.
The protagonist screams on the phone to her friend that she is danger and to go home. The friend ‘oh I’m getting another call. Bye’ no concern at all.
I could go on.
This movie is horror trash. Horror trash is still fun to scream at which is why it gets two stars instead of one. But I really do not understand all of these 5 star reviews sucking the D of this movie.