For me it would really depend on the context.

I had an abusive mother and self-harmed, a lot. By my teenage years I was bouncing back and forth between self-harm and realizing I was not insane, my mom was an abuser, and starting to find adults and peers who would listen to me and recognize it. I also discovered I could channel my feelings through writing and art, that catharsis of expressing my feelings in a healthy was rather than just turning them back on myself.

As an adult, is it worth noting when a young person starts expressing themselves like that; absolutely. Shit’s rough, it can get overwhelming, and a lot of young people cut their journey short intentionally or recklessly trying to deal with it. Sometimes it’s just a young person piercing the veil and figuring out the world isn’t all it’s cracked up to be and venting their disillusion. Other times it’s hopelessness. As an adult I’d like to think I could figure out which it is; commiserate with a youth about the bullshit but have the wisdom to know when to know when to intervene.