He had a winning record last year and tied for first place, losing out of a division win on tie breakers. To read about it here, DA is the worst head coach in the history of coaching, and has personally tainted every positive aspect of the franchise.
that's the PR way of saying "we didn't make the playoffs again with a very winnable schedule and a laughable division (two years in a row!!!) with a team who looked mediocre all season"