Whilst I believe social media is bad for everyone’s health (the unethical manipulation of users by the social media companies), the reason it is so so terrible for teenagers is it removes any possibility of escape for the horrendous “Lord of the flies” that is high school.
If I hadn’t been able to escape that environment each evening, I very much doubt I would still be here. And I wasn’t suffering anywhere near as much as many people I knew.
High school is a terrible idea, and social media extends and amplifies the horrible behaviours it engenders.