Increased social networks, brings different ways of bullying.
The lack of RL friends can make you feel even more "odd" and isolated.
My DD is a Goth, she spends a lot of time on line, she discovered her interests, herself and expanded mine, such as Studio Ghibli and Japanese animation etc.
She has S&L issues, which gives her confidence issues.
Having on-line friends doesn't make up for RL friends, but it helps.
I think any fringe/alternative group is better accepted, these days, as bigotry is getting less.
From a personal POV from teens, I mix/work with them, their personal experiences aren't any easier than they ever were.
Generally the MH of teens is on a downward slide.
Academic achievement is more valued now, which helps the geeky/book worm kids.