They hate themselves and everyone else and ultimately try to kill everyone or whatever. Boohoo.

This was a re-read because when I tried to read the next book I couldn't remember what happened before. 

I almost thought it was a different experience (having listened to it via audiobook this time). However my previous icks came back: despite the really neat plot and cool pseudo sci fi, the "dark academia" vibes are meh. All the characters are well off but still try to convince people that they have suffered and are unique. 

Anyway, I still want to know how it all ends so I'll be starting book 3 soon.