I guess I'm in the minority when I say I don't think there's anything wrong with Dez.
When the CB is allowed to cheat, it makes it tough on any WR. Janoris Jenkins employed the Richard Sherman/Darrelle Revis strategy in which they grab and push the WR all game because they know it won't be called much, if at all. The one they called on Jenkins wasn't as egregious as a few others he got away with.
Being "physical" is one thing. But you're not supposed to be able to impede the WR's route with the ball in the air, and you're CERTAINLY not supposed to be able to bump/push the WR towards the sidelines with the ball in the air.
Jason Garrett has made the Shaq comparison and it fits. Shaquille O'Neal was so big and strong that he would get hammered by smaller guys and they'd get away with it. CBs are allowed to basically cheat vs Dez because he's so big and strong that it almost wouldn't be fair if they couldn't get away with some illegal tactics.