I don't know if this will be helpful, but I wrestled a lot with dealing with despair/fear from upheaval as well. Mostly climate like I said, but I used to cry for days thinking about kids starving in Venezuela, for example (that's a crisis from many many years back).

Studying history actually helped me cope. Just learning about the past like 5000 years of human history and how much upheavals and famine and war and civilization collapses there have been.

I kind of realized that feeling like the world is ending (as we know it) is the NORM rather than the exception for most of human existence.

We've been exceptionally lucky in Western countries for the past 300ish years. But that caused us to believe that's what's to be expected. It's not.

It just helped me understand that humans have survived through lots of things. And the turmoil comes with being alive.