I've taken a little interest in the chiefs ever since Football Outsiders made their out on a limb pick for them to go to the playoffs last year. I felt the Chiefs had made good decisions in the front office and come up with an effective game plan.
Unfortunately, I think last years success protected a dangerous member of your organization, the coach. Simply put, he is terrible. You succeeded last year in spite of him, you had an offensive coordinator that put together a great game plan and developed Castle and a front office overriding him and making smart choices. With the departure of your OC the guy that thought Thomas Jones was a feature back and having Matt Cassel sling it around was back in charge, with predictable results. Injuries will be a big part of a bad season now, but even without them I think you can sense that the coach is the problem. If you want to turn things back around, get rid of him.