Sherlock has never been the jolliest bloke on the block, but this version looks especially unhappy, despite having his cell phone, violin and skull with him.
Maybe, like the rest of us, he’s mad that Underground Toys, who manufacture him, switched the Doctor Who line to be mostly a smaller scale, so he won’t match up with the Doctor in a fair fight. Or maybe he’s anticipating the folks who’ll throw him into their McFarlane Walking Dead dioramas, where good brains get eaten rather than saving the day.
Eh, this is Sherlock. Most likely he’s just copping an attitude because we’re stupid.