The vast majority of people of any age and throughout history will say their life was simpler and caused less anxiety before they were 14. That has nothing to do with the internet.
Health anxiety is also nothing new, and puberty does cause a lot of changes in body and mind. Even without access to information people have worried about their lumps, aches and pains, sometimes too frightened to seek information or see a doctor.
I agree that 24/7 rolling news from around the world is not always healthy, especially because hearing every development of the same incident many times over a long period can make the situation seem worse than it is.
For instance you read about a fatal stabbing that happened a mile from your home. You may read and hear about it several times a day for a week. Same when somebody is arrested, then charged. Months later the trial is reported. The vigils are reported, the victim's family and friends are in the news.
It is overload and can make us feel a stabbing happens in our neighbourhood every week.
What is dangerous is the anonymity the internet gives keyboard warriors, the insane, the troublemakers, the bigots, the conspiracy theorists. People who you would instantly dismiss and avoid after half an hour if you happened to find yourself next to them in a pub.
The scammers, users and abusers who now have access to potentially millions of people.
The positives does outweigh all of that, though. We no longer live in the same tribes and villages as our ancestors and through necessity families may live many miles apart. The internet helps to bring people together on a daily basis.
Online support groups are invaluable for the mental wellbeing of those living with debilitating heath problems, and their carers.
Instant access to knowledge from a wide range of sources is a modern day miracle.
The ability to get advice for practical problems is extremely useful to me.
There are aspects of the internet I hate but I can avoid them.