I can only speak to the people I've engaged with in the US and parts of Europe, but people aren't really willing to make the changes that really seem most important to me. Drastically reducingoil use, for example, would make a big difference but would destroy the GDP measure that many countries value so highly and would cause a huge shock to most every industry in the world. We've grown too dependant on industrialized food, easy access to products, and the power of leveraging cheap energy to go back to doing most things manually or with the help of animal power.
That can absolutely be depressing as well, but that's where I have to remind myself that the environment functions on the scale of thousands of years rather than decades. This planet and the life on it is an absolutely amazing thing, and amazingly resilient. I hope we can pull out of this nosedive so that we can continue to see what humans come up with, but I rest assured that we can't literally destroy the planet and that "the end" for us will be well down the road.
In the meantime, I just try to do my part to minimize my impact and partner with nature rather than fight it. I want to enjoy my life, and for me part of that is pushing myself to the point of some frustration and discomfort. I live in a small house with simple utilities and hope to have it off grid soon. Yes I still have a car and buy some things from Amazon or the grocery store, but I do without when I can and at least a few times a week I get annoyed that I don't have more storage in my tiny house. I figure if I'm feeling a bit of that pain I must be doing something right and can better enjoy the good parts of life.