When you have a really bad team, do you care if it has an 'official ranking' of worst, third from worst, or fourth from worst? No, you don't. You just know the team is really bad and isn't winning many games.
When they've been long-term bad, like the Bills or Jaguars, you just sort of accept it. But when they've had a relatively long history of success and playoff appearances-- like the Eagles-- then turn bad, it tends to hurt a lot more.