Bitchcore is a catch-all word for melodic metalcore, overproduced alt rock/pop punk, or pop punk trying to be far edgier than it is. If you've ever heard Crash Thompson say an album was "swallowed by the Imagine Dragon", he's referring to a type of bitchcore. I'm calling it bitchcore because it's the type of music a Monster energy drink chugging skaters that are highly insecure about their masculinity, and would be extremely butthurt about being called a "bitch" would listen to. That girls who want to pretend that they like ""edgy"" music when they can't tolerate anything edgier than P!ATD, but will give you shit for not having "cool" enough taste.
Basically this album is the pinnacle of that shit.