Can't win without an offense starter at any position. No QB, No RB, No WR, No TE.
So while I do agree that the Defense is not great right now, they may be better if they weren't on the field for 3/4 of the game. The offense can't get a drive going. So when your defense is old, they will definitely get tired and slower as the game goes on. But this offseason will be so much fun because we can evaluate EVERY position because every position is a need and a must.