In four countries of the Five Eyes, life evaluations among under 25-year-olds dropped significantly over the past decade, probably because of scrolling through social media:
https://www.cbc.ca/news/world/world-happiness-2026-canada-25-9.7134296
https://www.cbc.ca/news/world/world-happiness-2026-canada-25-9.7134296

Canada slips further down in World Happiness rankings, due in part to social media use | CBC News
Heavy social media use has contributed to a stark decline in well-being among young people, with the effects particularly worrying in teenage girls in English-speaking countries — including Canada — and Western Europe, according to the 2026 World Happiness Report published Thursday.