That's just it. He didn't cheat. He had no hand in this obvious "sting" operation, and there is no proof that he did.
The NFL has worked for decades to eliminate the profit-damaging spectre of "a dynasty" from Legue lexicon. Dynasties hurt overall NFL profit, because they reinforce the (justifiable) appearance that there are teams out there with no chance at all of winning a Super Bowl, and that hurts market share in those cities.
Then along come Belichick and Brady and they dominate the League for over a decade, playing a total of six Super Bowls in 13 years (Brady missed one whole year with a knee injury). That's virtually a Super Bowl every-other year for now going on two decades, with no end in sight.
You think the NFL isn't p*ssed? After instituting free agency, the salary cap, and rules changes designed to thwart Belichick and the Patties, and they just keep winning Super Bowls while they make a joke of the AFC East and the League's efforts to contain their true, previously unheard-of greatness.
Enjoy it while it lasts, because you're seeing the last greatest football franchise of all time, and the League will never let it be repeated.
If they could shoot Tom Brady, they would.
It's deliberate.
For the Patriots, it isn't the first time.