Sec School (a crap comp) ruined my teen tears and left with me with issues I still have today, 40 years later.
I was bullied mercilessly throughout, not just verbal but physical too including being hit, spat on, burned with fag ends and having property damaged & stolen (bag, books, etc).
Always the same response when I reported it to parents & staff - basically that I should learn to fight back (nice bit of victim blaming there!)
Teachers were completely useless. I told them who the bullies were and what they did, but they were "popular" i.e. in school sports teams, in school plays, etc so were friendly with teachers outside the classroom. Some were alphabetically next to me so in classes/groups sorted by name, I was always in "their group" so couldn't get away from them in lessons.
I'd literally hide at breaks & lunchtime so they couldn't find me (under stage in school hall was my favourite).
This was 40 years ago, so some schools have been toxic places for some people for decades, it's certainly not just recent with the advent of SM - that just changes the nature of the bullying.