It's death
https://jesseduffield.com/ITS-DEATH/Hopelessness and injustice seem to be the current zeitgeist - at least for anyone who spends a lot of time online. And I get it, there's plenty to be unhappy about.
But my counter-argument is that it's possible to do things in life that you're proud of. And find happiness in the simplest of places. And most people would do better to focus the majority of their attention on those things.
This story says "do yourself a favour and forgive yourself for any failings on your part, you’re only human after all" - which I agree with. But I'd go one step further and add "celebrate your successes" and try to align your life in such a way that you can have successes worthy of celebrating.
It makes me wonder: with everyone seemingly so unhappy, why aren't there more people pursuing alternative lifestyles? Similar to the 60s counterculture. You don't need the whole world to go along with you - just a handful (or less) of likeminded people. Or some people even manage to go it alone.
It seems a lot of people (perhaps a vocal minority?) actually enjoy being upset. Or maybe everyone is going through ups and downs but we just tend to be more vocal when we're upset.