The vocals are a texture. It's really an instrumental album. I think the way he screams adds a beautiful element to the music. It makes it a bit less easy to listen to, sure, but thats the point. They create a discomfort that makes the songs so moving.
I like the texture the vocals add in certain sections, but there are other parts where I could have done without them/with them a bit less muddy.
I'm not a fan of whatever this genre is, but this album is fantastic. Truly a one of a kind album that sounds just like its artwork looks. Thanks for the recommendation drew, it's been a favorite of mine for sunset drives.