I think, in general, most of us now are less resiliant than our parents/grandparents. I know I would be useless in a war situation. I don't think I could have coped if my husband was sent away to fight.
Just looking at what my parents went through -
Dad - had TB together with two of his sisters. One sister survived, one died. He lived in London during the Blitz and the family were bombed out twice. On one occasion Granddad was taken to hospital and they didn't know if he was alive or dead or indeed where he was for a week, when he managed to find where they had been moved to and just turned up. The sister who survived TB married during her husband's 48 hour pass from the Army and then didn't see him for 4 years.
Mum - Lost a sister to Diptheria (TB and Diptheria now being survivable due to vaccines!). Brother killed during the war. Another sister mentally impaired due to being caught in a bomb blast.
In those days the majority of people didn't have central heating, or ineed, indoor plumbing. Food was just what was available and very little choice.
Even when I was young, money was very tight and there were many times when Dad had to walk the 4 miles to and from work because he didn't have the money spare for the bus fare. We also didn't have central heating.
I'm not saying that many, many people were not scarred by the war but I think on the whole people were more hardy and we should think ourselves lucky that the science has evolved to at least make a start on getting life back to something like normal.