This was enjoyable from start to finish, and I don't get the negative reviews, particularly those whining about Gen Z; this isn't just Gen Z, it's any group of rich kids having a party that goes very wrong in any generation, with the same behaviors and reactions any of them would have exhibited in any generation, of course with minor differences. So enough about that.
I also did not expect a typical slasher movie when I started watching this, and the marketing I saw didn't depict it that way, so I don't get the whining about it not being a slasher movie or even a horror movie; it does fall into that genre though, so enough about that.
The actors are smart and behave like real people, and the story is clever, especially the twist at the end. There are no dull moments unless you aren't interested in character development or storyline, so in that case go watch Friday the 13th and leave this film for the rest of us who can appreciate it.
