There is so much that screams "stress" to me when I think of living in the US that makes me uncomfortable. To just mention that your job can fire you at will and your health care might be attached to your job, or that a person who can not drive a car for health reasons, like me, is basically fucked. Or no sick days and a very low amount of vacation days that you might have to take when you are sick and on top taking them at all is looked down on, while my boss reminds me to tell him when I prefer to take my vacation days, because by law I have to take them.
I could make a very long list of things that come with American life that I find stressful. Just one more tiny thing: I do not have much money, so I have to be careful not to overspent. In Germany the prices on the shelf in the grocery store are the total I will have to pay. In the US the total can be whatever, you just have to be really good at doing math in your head, have enough money to not care or walk around with a calculator. So it is not just the big things that add onto each other. If I am sick I can walk to the nearest grocery store and drug store in less than 3 minutes from my flat, the doctor's office is inbetween both and the visit is free and medication either free or costs 5 Euro each for what I usually need. My gall bladder surgery was all in all 100 Euro, including ambulance transport on a Sunday because it was an emergency and aftercare with my doctor. My days in the hospital and at home afterwards were fully paid by my employer.
I wonder what America would look like if everyone would live on an European stress level. We do not have no stress of course, but the base line for many Europeans is way lower. On top there is a base line of feeling safer (less shooting, except for Ukraine of course) and more social secure.
It surprises me that despite all that, Americans do rarely complain and are as happy as they are. I admire them for that, but also wish they could have less stress in their lifes.