What double standard is that? You haven't really mentioned any double standard. All you've done is express your displeasure at the idea that fans can call BS on someone who signs a contract and immediately starts talking about how new contract isn't enough and demands game time, when the reason for that lack of game time is him being injured basically every other week..
As I said, this isn’t limited to Bailly, you have people turning up at Rooney’s house in 2011 during the contract wrangles, to celebrate with glee 4 years later as he left, all the summer transfer threads of De Gea, ‘giving him whatever he wants’ to now openly calling to offload him because of that same contract everybody were all too willing to give. The point here is contracts aren’t worth the paper they are written on the moment the players outlive their usefulness, so we have little grounds to complain about someone looking after himself, as that contract ‘protects his value’ in the eye of the club. He clearly lacks self-awareness, or at best, rather hopeful about his fitness prospect, but from his POV there’s nothing wrong with saying ‘if you don’t give me games, sell me’, whether he’s out of contract in a year or 5.
Just to be clear here, I think he should have been sold long ago, I think he shouldn’t have been offered a new contract, but that’s on us. He’s been consistent in his demand for game time, so there’s nothing in these latest comments that should surprise anybody.