I don't like the idea of shipping food all over the world, it seems wasteful. But I do appreciate the benefits, done well it definitely allows everyone to have a better quality of life.
What keeps me comfy at night is doing my little bit, buying local stuff whenever it's available, growing a little bit of my own food.
Whilst the economics of growing your own staples kinda suck, there's plenty of things you can grow that are really rewarding. Fruit and herbs are my favourites because they often suffer the most from long distance shipping, a fresh tomato grown by a beginner in the wrong climate can still beat anything from the supermarket.
Sometimes I feel like OP, that no matter what I do it'll all fall apart in the end. But working to make my little bit of the world comfier for everyone helps to keep my mind off it. I just do my bit and hope everyone else does theirs.
Another thing that keeps me going when all seems dark is the idea of feedback. Fedeback in society often seems positive, people just go with the flow, they see good they do more good, they see bad they do more bad. Sometimes it seems like for that reason we're just a few really shit days away from a downward spiral into eternal shittyness.
But the fact that humans are still around and not doing too badly suggests to me that there's some strong negative feedback too, and that's where I put my faith.
On some level, almost everyone wants things to be better and has the capability to make them so. Today, they might not care, but the worse things get the more motivated people are to fight it. Opression breeds resistance, adversity strengthens resolve, and as long as the knowledge remains that things could be better, they will eventually get better again.
Remember rolls, the smallest act of rebellion against a hopeless situation can inspire a whole counterculture. Vive la révolution confortable!