Both teams are a dumpster fire this season. Just so happens both play in the same division and one of them had to win this junk division. Making the playoffs for either was not going to be some celebration or accomplishment. Every division has to send a winner.
Winning the division for the Eagles was actually an accomplishment considering the injuries to key starters and the number of unknowns that had to play the last month of the season. They over achieved while the Cowboys under achieved.