I think the only real point of genuinely stupid decision-making is that the protagonist chooses to stay in the house in the first place.

Ask any woman if they'd stay in a house with a strange man after a 'Mix-up' when they had a working car with gas. Not one of them would.

But that's sort of the inciting incident of the film, its the thing that has to happen for the plot to exist. And thematically the film takes quite deliberate joy in playing the game of 'how many red flags can we put up for the character to ignore' because they obviously end up subverting it.