Running:
- No more PRs
- Hard workouts take a longer time to recover from
- Injuries tend to happen more frequently and take longer to heal
Finances/career:
- Retirement is a long way off
- Inflation is rising faster than wages
- Further career advancement isn't worth the additional stress, responsibility, and working hours
Personal:
- Friends and most other people in the same age-range are too busy with their families and don't have time to hang out
- Grandparents have all died, parents are in their 70s and might not have much time left
Politics/world affairs:
- Both the left and the right are getting too extreme
- The easily extractable fossil fuels have run out. If we can't find more, the lack of dense, reliable energy will throw us back into a 19th century standard of living. If we do find more, the effects of climate change will throw us back into a 19th century standard of living.
Tech advances:
- Social media is a net negative
- Cool futuristic adventures like space tourism are only available to the ultra-rich
- Technology is slowing down, 1972 to 2022 had a lot less change than 1900 to 1950.