During my high school days (60s) drugs and drinking were very prevalent, more so among adults than teens, but there were plenty of fatal car crashes and overdoses occurring. The music culture of the 50s, 60s and 70s and 80s and even to the present day is wrapped around booze, drugs and sex.
All the present day teens I know and see seem to be academically gifted and busy with social lives and school, part time jobs, enjoying family vacations and friends and sports activities. The technology they use are just tools and helpful in their goals. I see teens on the buses looking quite happy and wholesome, so I don't know where this trashing of present day teens is coming from. Maybe its worse in the UK and US and related to poverty. Perhaps some examples and statistics might be helpful. Granted teens are known to be outrageously rebellious and if they weren't I'd worry about their passivity.
Maybe some people are even envious of the better lives present day teens have (better clothes, money, entertainment, fun, nicer parents, access to information highway, education and even smarter than some of us ever were. They have so much more than we ever did. The typical things we hear about the good old days are things like how someone had to walk miles and miles to school in a snowstorm, wearing hand me downs clothes, bad food, having to work at a job to help support the family of 10 kids, not enough money to buy luxuries, etc. etc. as if that somehow makes one a better person. Present day teens don't have these problems, unless they live in a third world country.
I can't agree that we had it better or were happier and less screwed up than the teens of today. They struggle to get through life just like the teens of the past and like we did and do.