The answer to that depends on which groups are being referred to. While the world breathed a collective sigh of relief after the end of Word War II, and GIs came home to find a receptive atmosphere for them to go back to school and buy homes, women who had tasted independent lives and jobs outside the home were forced back into conformity as housewives, and African Americans, even those honored in the war, faced just as much discrimination as ever. (Not to mention there was never an apology for the Japanese internment camps, and Japanese Americans were still regarded with deep suspicion.)
And don't forget that the term "PTSD" had not yet been coined. Many of the World War II vets suffered in silence for the rest of their lives after what they had seen (and done). So, no, in general, the illusion that this was some kind of Golden Age of American life is just that—an illusion.