There is one thing that you guys don't understand in this case and someone explained it and I had to agree with him.
Check out;
Assuming that you are Manchester city owner, you employ Amorim and Ruud becomes his assistant after an excellent stat as an interim coach.
Then, Amorim lost 6 matches, won 2 and drew 2 in his first 10 matches. What will be your next move?
Sack Amorim and make Ruud the head coach right? Have you seen why Ruud will not assist Amorim. Even if Ruud wishes to, Amorim will not agree.
I think you made a typo. I believe you are referring to Manchester United and not Manchester City.
Amorim made his decision about who wants to work with and the club supported him. I don’t think we should force staff on a manager and vice versa. Amorim has his own team, when I saw the video of him and his team boarding a flight to Manchester I knew there was no place for Ruud van Nistelrooy on that team because of how many people Amorim already had on his team.