Here is the list for you:
TO, Crayton Romo, Wade Phillips, Bennett, most of the NFL media, many current NFL players that play against his predictable schemes, 92% if the Cowboys fan base (Poll).
I'm sure I am forgetting many people that have laughed at Garrett or wondered why he has a job. But this is more than sufficient to portray a coach that where most of the NFL landscape is wondering why he still has a job. In fact, you might want to make a list of people that actually think he is a good coach:
Idgit, Jones, 7% of Cowboy fans.