This is the playlist I made for Brutal! It contains a song for every chapter, each song either capturing the mood of the chapter or has lyrics that were fitting.
Intro: werewolf - chloe moriondo
Chapter 1: Idle Town - Conan Gray
Chapter 2: Oh No! - MARINA
chapter 3: Buzzkill - Baby Queen
Chapter 4: Crush - Tessa Violet
Chapter 5: HEAVEN - Troye Sivan
Chapter 6: People I Don't Like - UPSAHL
Chapter 7: Bad Ideas - Tessa Violet
Chapter 8: Pretty Ugly - Tierra Whack
Chapter 9: Shit Show - Peter McPoland
Chapter 10: Glory and Gore - Lorde
Chapter 11: Mistaken - Tove Lo
Chapter 12: Grace Kelly - MIKA
Chapter 13: HIM - Sam Smith
Chapter 14: idontwannabeyouanymore - Billie Eilish
Chapter 15: Dancing On My Own - Robyn
Chapter 16: 8TEEN - khalid
Chapter 17: Wishful Drinking - Tessa Violet
Chapter 18: No Going Back - Yuno
Chapter 19: Burning - Maggie Rogers
Chapter 20: Out of My League - Fitz and The Tantrums
Chapter 21: Are You Bored Yet? - Wallows ft. Clairo
Chapter 22: Electric Love - BÃRNS
Chapter 23: Boys - Hippo Campus
Chapter 24: when the party's over - Billie Eilish
Chapter 25: brutal - Olivia Rodrigo
Chapter 26: Monster - dodie
Chapter 27: Cut My Lip - Twenty One Pilots
Chapter 28: The Kids Aren't Alright - Fall Out Boy
Chapter 29: Feels Like - Gracie Abrams
Chapter 30: Watching My Phone - King Princess
Interlude I: circle the drain - Soccer Mommy
Chapter 31: 9th of october - Tove Lo
Chapter 32: everything sucks - vaultboy
Chapter 33: Home - Cavetown
Interlude II: Queen of Nothing - Elliot Lee
Chapter 34: Quantum Physics - Ruby Waters
Chapter 35: Supercut - Lorde
Chapter 36: Motion Sickness - Phoebe Bridgers
Chapter 37: Cheap Queen - King Princess
Chapter 38: I Wanna Get Better - Bleachers
Interlude III: I Want To Be With You - chloe moriondo
Chapter 39: for him. - Troye Sivan
Epilogue: Ends of the Earth - Lord Huron