Because he has no feel for the game of football and doesn’t do X’s and O’s just runs the same offense and tells you “out play your man”
It shouldn’t take weeks of bashing to tell you to run the football on 4th and inches when you have prime Elliott, being up 20-30 points in the second half he blew 2 games by throwing it once when Demarco Murray was average 8.9 yards per carry
Don’t get me started on time management, Jason Garrett alone was worst 3 losses, whatever you think the cowboys would be, say 11-5 you subtract 3 wins due to Garrett and put them at 8-8 he was a complete liability
These are just a few of his offenses and I could go on and on, dude wasn’t a good coach at all
You see the Giants fired him for the same crap….worst coach in cowboys history and yes worst than Campo