I know many people who are in the same situation as me too--unhappy and stressed out a lot of the time and they let their jobs run their lives. I once calculated that people living in the United States who make above about $16 / hour have a higher wage than 99% of the world. But are we 1%ers (as a percentage of the global population) truly happy?
Many are not. It's really weird to think about. Maybe it's a matter of perspective. Some day I hope to have a simpler life with less responsibility and live on less income.
You are a deep thinker and that is a good thing!