This is a Western-centric and specifically Americentric viewpoint. There are plenty in the East for example who are not cynical about their ability to solve existential problems and are instead plowing ahead on solving them, such as massive investment in non-petroleum-based energy sources like solar, wind, and nuclear.
Pessimism is not a uniquely American viewpoint.
"South Korea is second from bottom on our list in terms of the proportion of people saying their country “is heading in the right direction”, with only 15% stating so. A similar sentiment is also felt about the economy. Pessimism is usually the standard for South Korea; however, their economic indicator score has been particularly low in recent times, with just 8% believing the economy is “good”."
https://www.ipsos.com/en-ch/what-worries-world-may-2025?utm_...