Not really a satisfying movie hence the bad reviews. But I would give it a 2.5 or 3 because it achieved and earned the cast and crew a lot of money and popularity as people would rush to watch it because of the bad reviews.
There is a lot of assumed lessons the movie bring out like dont entertain or help strangers even if they are in the rain(is this good or bad?), dont sleep with strangers(which he was seduced to do, but that did not justify the fact that he still did it), among others. What would have happened if he left them outside, in the cold rain? I think he tried his best by calling the uber but he had already made them feel at home and since they were on a mission to destroy his life, they set to accomplish it. Again imagine he did not heed to their seduction, what follows? Would they have left?
The film achieved somethings like getting huge view and leaving ?s in the minds of viewers.