He has made progress recently in this area, but no one wants him to succumb to the brainwashers who would script his every move. The real Stewart has many more pluses than minuses. Whether one likes him or not, one must concede that Stewart is real. Few men as adept at what they do as Stewart is are not spirited. Part of the reason for his temper is his competitive fire, his will to win and his hatred of losing.
Fury is a necessary part of the warrior's character.