There have been far worse teams than ours give Liverpool/City a game, my take is that Rangnick's focus is solely tactical and he is neglecting the emotional side of the game.
So why does worse team than United give Liverpool or City a game?
Why is it we don't tackle, why is it we don't run, why is it we don't press, why is it we don't score from corners.
Why that happens? Is because they do not want to put their bodies on the line.
A corner for United taken by Shaw - you have Pogba, Sancho, Fred, Rashford, Dalot, Bruno, De Gea, Bissaka those are 9 player who can not score from a Corner. Then people will wonder why we dont score from set pieces. If we have Lindelof with Maguire on defence then it's only Maguire and Ronaldo who can score from a corner in such a team. This things are very easy to see. Why United is so easy to play against, is because it's very easy to dissect it's flaws.
In that team the only players who can press is Fred. Everyone else is pits.
Who can tackle in that team properly. Bissaka and McT at most.
So Ralf motivation should make Sancho start making tackles, or Pogba to start pressing or Rashford to start to run, our problem is we have a very poor and limited squad. A squad built without any plan to it, just players dropped from wherever.
We need a systematic building of the squad, it's not a coincidence even when Ole tried to play in a structured way the team collapsed. This team is built for counter attacking which is running with a ball to a space in front of you.