If he was talking about when Dez didn't want to get back on the field then I hope that doesn't happen again.
We are all entitled to our opinions but I don't think Dez was "refusing" to go back on the field. During his rant was while they were reviewing the play to make sure it was a TD. From what I saw, he just wouldn't stop spazzing and Witten and Ware were trying to get him to calm down and just put on his helmet since we had time left. At one point you could see Dez say "I'm tired of it", which in my opinion, he is probably saying "I'm tired of losing."
But I don't think for one second Dez was trying to chill out on the sidelines and head back to the showers. He was just letting it be known that to continue to lose like this and be mediocre is unacceptable. Which it is. But alot of veterans are used to heartbreakers and mediocre seasons so in their mind its simply "On to the next one."