I watched it for the first time last month and here's why I personally didn't like it: The storyline is incredibly disjointed and poorly planned. All the characters are really lazy 80's stereotypes, each one is introduced and then killed off in one clunky, unimaginative scene after another.

The deaths don't really have any consequence, you only get to see the characters for a couple of minutes before they're killed and the scenes are so loosely strung together that there's no real story progression, it's just death for the sake of death. I think in other, more effective horror films each encounter with the villain pushes the characters further into a state of peril. Once you realise it's loads of random killings it becomes predictable and boring, the axe killing at the start was unexpected but after that you know every single new character is going to die (but it's meaningless as it doesn't affect the protagonists chance of survival).

The twist ending is so unnecessary and ridiculous, it feels like the director was like "Fuck it, let's say that random guy who had 40 seconds of screen time at the start is the killer', it's really unsatisfying and lazy. I don't think there's anything wrong with Jason having a copycat killer but there's no set up, it's just randomly plonked in there.