The main problem for any defender in this UNITED, no matter whom, could be Passarella, Figueroa or Beckenbaur it's that:
Upfront: they do not score, they do not pressure properly and in the mid, they do not control the ball, they do not recover and they loose the ball in a very cheap way...this exposes the backline time and again and when in the a match like this last one the keeper has a nightmare of a game, this shyte gets even worse.
Even if the defenders committ their share of mistakes, this is a constant in United since ages, at some point it becomes worse with every match and nowadays they are trying to implemenet a new system, even more difficult.