Have you guys ever worked with a co-worker who is not very good at their job but they are really nice and well-liked?
They really can't do the required work but people make excuses because the person is so likable, is always smiling and laughing, brings donuts to the office. After a while, none of that matters because that person's ineptness is getting you into trouble, costing the company money, and creating extra work for everyone. Eventually everyone has enough and stops caring about being nice.
That is Jason Garrett and Dallas right now.
He's ran out of excuses.