That does sound like him. I don't buy his whole "the car has changed" argument either, since he claims that the changes were introduced in Singapore and he was fine with them until Mexico.
Rather, I think he's on the receiving end of a "problem" that has largely been Rosberg's to deal with all season - his team-mate is in front. I think Mercedes have been pretty fair in handling strategies of late, but I doubt Hamilton likes the team refusing to give him the upper hand. It's a bit of a double standard.