It was not supposed to be like this. Zinedine Zidane’s return to Real Madrid in March, just nine months after his departure, was supposed to signal the end of an alarming slide.The man who masterminded an unprecedented run of three consecutive Champions League triumphs was back. The hope, the expectation, was that the real Real Madrid would follow him. Last season finished on a sour note, with Madrid winning only one of their final five games. But there was an understanding that the squad needed work and another round of lavish investment followed. Paul Pogba did not arrive. Nor did Kylian Mbappe or Neymar. But the money spent still topped £250m, with Eden Hazard – long coveted by Zidane – the headline addition. On Wednesday night in Paris, though, a season that had started awkwardly descended into full-blown crisis.Real Madrid were not just beaten, they were humiliated.Zidane feels pressure after Real CL lossPSG sweep aside lacklustre RealChampions League scores and fixturesParis Saint-Germain, without Neymar, Mbappe or even Edinson Cavani, ran out 3-0 winners at the Parc des Princes and it could easily have been worse. For the first time in a Champions League game since Opta started taking records in…