12th man ?
More like a 5th wheel.

This pathetic performance is definitively on Arians.

Offensive "Coordinator"? There was no coordination to our offense today, just chaos and disorganizaion and confusion.

Offensive "play-caller"? Look at the futility of the plays called today. You put your players in positions to fail all game long.

Arians .... adapt (if you can) or be gone.
Have the character and cahones like Ed Hoculi and stand up and take responsibility.
And then do something about it.