If he had been merely decent last season then I'd be very worried about his current level (which is undeniably not where it should be) but he wasn't - he was unreal. Backing him to be back to his best next season and to make those that are suggesting he needs moving on to look very silly.
But yes, clearly something wrong at the moment. Decision making and weight of pass are just not there right now. I think he's aware he's not performing to the level we've come to expect and he's overthinking most things.