People sometimes don't take into account is how ultra-competitive Tom Brady is.
He and Josh McDaniels have a level of expectation for the New England Patriots' offense and how they've built it up over the last 20 years to where it really should be like a machine.
And when it's not operating on all cylinders for a multitude of different reasons, there's a level of frustration.
It's not the fact that they're not winning. I guarantee he's happy that they're winning. It's just that the expectation he has for himself and the offense is always at the highest level.