I understand that, Man United need an adjustment process with Rangnick. I think whoever the coach is they need adaptation. That adaptation has been a long way off and now Man United have played like Rangnick's will. The movement of seizing the ball is very visible, they simultaneously presing on the opposing player. At least a few wins have given Man United the chance to keep going to ucl next season. "I think at the moment Man United is still unstable.
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Their condition is indeed improving but the problem of instability seems to have mushroomed in them.  Ragnick has slowly eroded this but it is undeniable that their playing pattern often looks like it is out of Ragnick's own control.  Man United's problem does not lie with the previous coach, but comes from their own players.  However, the character is ingrained and can't be changed that easily.