They just don't have any edge to them. They do not make their own luck. They don't press the issue and put their opponents on the back foot. They make dumb mistakes and are punished for it. They don't take advantage of other's mistakes. In a league filled with parity, that makes it very tough to win.
It's not Kerry Collins fault, limited as he is. His strengths are enough for a team to win, and his accuracy today was on a high level. Chris Johnson is turning into a fantastic running back. I guess that leaves it on the defense, and of course special teams.
A few years ago, a 1-4 start became a loss in the AFC Championship, but it seems unlikely to happen again. You'll likely hear Fisher saying that we just need to be patient and play our game, but it's not good enough in a game this emotional. I don't see the possibility that the needed change in attitude will come.
P.S.: One final note. The Comcast sports package is a must have now that the NFL RedZone channel is included. It is fantastic, and ESPN U is included as well.