Cap deals with his greatest enemy…Ennui!
Actually, the feeling of having to act–to do something, anything–is a common symptom of PTSD. A craving for action, a belief that things are not okay and something must be done, a compulsive fear of standing still…This is done very well.
This is actually a story ahead of its time. Captain America can’t wear his costume because he’s upset about Bucky and can’t ride motorcycles any more because the last time he did it was with Bucky, and it brings back the memories of his death.
He wanders the streets and wrestles with the public’s perception of him.
Seeking to “get over it,” he buys a bike, goes after a Wild-Bunch-ish gang, and beats the snot of them.
Then, he’s happy and free again.
Yeah, it’s a simplistic approach to Post-Traumatic Stress Disorder, but it’s important to remember that PTSD didn’t even exist when this comic was made–it wasn’t a recognized disorder until years later. This was written when boys were coming back from Vietnam emotionally destroyed, and movies like Coming Home were considered groundbreaking.
And there’s a brief check in with Red Skull.