Discipline and regimentation are things like PT and obeying your officers. This is bureaucratic red tape - and it is not immediately evident to me, admittedly a civilian, that a 1LT would be expected to know how to navigate this bureaucracy - especially one who was wounded.
It is also about adhering to the rules and regulations. Because of the necessity and great importance of discipline on the battlefield it must be part of every aspect of the military, even off the battlefield. It evens descends to the level of how a soldiers places his socks and underwear in his footlocker and how his uniform is hung in a locker during basic training. Another important part of a soldiers training, especially that of an officer is responsibility for his actions as well as those of his subordinates. If he can't be responsible for his own actions then he certainly can't be responsibility for those of his men as he is supposed to be.
This guy is looking more and more like a whiner or else the newspaper is doing a hit job on him.