It is certainly not “generally accepted” that Patton had any psychological problems. When he struck two men with his gloves, the incident became exaggerated by a leftist press who had been hounding him.
Calling the most successful general in modern times “fragile” is a very odd characterization considering he was often at the front with his men.
The term fragile is used to describe his emotional swings, not his strength of character, tactical genius, or leadership.