The main problem with this movie is that none of the characters act like themselves. The overall story is mostly fine, but when all very popular characters behave in random or even bizarre ways it makes the twists that rely on previous knowledge of the characters pointless. The aesthetic is pretty cool, but the movie doesn’t make the most of it.
Closest comparison: It’s like Bad Blood by way of Hush.
Setting: Noir
Plot: Serial Killer Mystery
Tone: Super Hero