being young is hard, you’re full of intense and volatile emotions, the world is an overwhelming and scary place, adults often lack patience or compassion for the intense experiences of youth, and music makes people feel less alone.
when i was in middle school/high school, people would make fun of me for listening to “wrist cutter music” (this was over 10 years ago). emo/alt rock/pop punk was pretty big then and a lot of it was pretty angsty and/or sad.
grunge was huge with young people in the 90s, and that was a pretty angsty/disillusioned movement too.
i’m not sure i see this as a new trend? i think the music itself changes but the appetite for art that speaks to these big feelings remains.