Have you seen Juventus' xPTS for this season? We've earned almost 12 points more than we deserved by this metrics, for example Napoli's xPTS is -4.75 and inter's is -4.63 only
And now look at Pep's city - their xPTS is only -0.27, now feel the difference with Juventus, almost 12 points that mathematically were not deserved, but fortunately for us that very often xG, xA and xPTS doesn't mean shit and you still win the title