Nahhhh not even close to hardest loss to accept. Frustrating yes, because they played well enough to win and really should've won. Just didn't make enough plays when they presented themselves.
The hardest losses for me to accept were the ones where the Colts were expected to win, especially during the Manning years....playoff losses to the Chargers, '05 against Pittsburgh, etc.
Even the Super Bowl loss to New Orleans I can understand given the injuries to Feeeney and the corners through out the game.