The Jerod Mayo era with the New England Patriots was much shorter than anyone would have anticipated when he was originally hired as head coach, but people within the organization aren't surprised he only lasted one season on the job.
In a story detailing Mayo's rapid downfall by The Athletic's Chad Graff, the most common point that came up was he felt in over his head with the job.
Graff explained that Mayo seemed to be working so hard to differentiate himself and his style of coaching from Bill Belichick that it backfired on him.