Life is super stressful, and usually because of people, but without people and a modern day organized society life would be a lot harder in a different way. Rather then stressing out about other people and jobs, we'd be stressing out about finding enough food to survive and having to kill stuff by yourself, also defending yourself cause there'd probably be other people that want to kill you for survival reasons.
Life is what you make of it. You literally got the freedom to whatever you want. Not all everything is a good choice, but in the end no one is stopping you from making a life destroying decision such as blowing all your money on gambling or drugs.
Smart people learn from the stressful parts of their life and use that knowledge to make life better for themselves. Anything is possible if you have your mind set and the motivation to keep going despite all the setbacks you might face.