Simply put, Jerry does nothing wrong! He slaves and works harder than anyone knows. How could anyone think not?? This is what he thinks??
It is exactly what he thinks. He had zero football management experience before buying the franchise. He hired and received solid assistance from a great college head coach in managing coaches and players. He helped negotiate one of the biggest trades in NFL history with a franchise desperate for player name recognition.
His 'labors' paid off with two championships in quick order. After divorcing himself from his two-time defending Super Bowl head coach over hurt feelings, he claimed 500 coaches could win him Super Bowls with his team. He hired another famous college head coach, who told him both he and his predecessor were idiots for allowing personal disagreements from continuing their mutual success. The move, along with acquiring the best cornerback in the game, produced a third and final championship.
The almost unprecedented NFL success within a brief window in time virtually cemented his self-belief as the best GM in the league. Nothing has disengaged his false self-belief over the course of nearly three decades. Not poor seasons. Not seasons ending in abbreviated postseason appearances. Not underachieving head coaching hires. Not player acquisition strategies ranging from the weird (i.e. Drew Henson, Quincy Carter) to the good-to-great but not capitalized upon (i.e. Chris Canty, DeMarcus Ware). Nothing.
The self belief was reinforced after he received a Gold Jacket more for what he did for the league than as a GM. The incorrectly perceived validation was the finishing touch. Any tiny opportunity was squashed for him to unclenched his death grip on football management at that time.
Some people believe his son neuters his GM oversight, despite examples of his complete autonomy in acquiring a quarterback with virtually no internal pre-discussion. He remains the final decision maker and continues telling the world he is doing everything he can to win HIS way--which history has illustrated is a mirage of his own making.