I agree with the gist but don’t think Pogba sulked against Spurs. It was more a case of his flaws being exposed by Spurs midfielders that appreciate talent is nothing without graft. But you’re spot on about that match being a huge turning point. We set up to take the game to them, looked great for 15 minutes then completely lost our way. Pogba played his part by looking a million miles short of the potential captain he’s supposed to be but I don’t think he stopped trying in that game. He just didn’t step up when we needed him most.
IMO the sulking took place during the Newcastle game. A response to being dropped (and, presumably in his mind, scapegoated) after the Spurs debacle. Then we had the “sickie”. So yeah, there’s obviously a battle of wills going on here but Pogba certain isn’t being harshly treated. It’s almost all on him.
In truth, we don't have a clue how we set up to play against them as they scored after 11 seconds. We responded well which I think is the 15 minute period you are referring to but against this current Spurs side, it's difficult to get back into the game with a deficit.