What has him troubled — what has him waking up choking on his bile — isn’t what you might expect. It’s not concern that the Commanders’ coaching staff could spring something on the Cowboys for which they are entirely unprepared. And it’s not his team’s raw ability. It’s a thing that’s harder to put into words, and impervious to strategy. Even as he is trying to study his next opponent, he can’t shake what happened on Sunday. How his team, the moment the Jaguars pushed back, collapsed. How, the moment the players felt the pressure, they began to commit penalties and the sort of small but critical mental errors that only a coach watching video can perceive. In their performance he smells the sort of failure he defines himself against.