I was a little surprised by the management's dissatisfaction with Ruud van Nistelrooy to handle Manchester United that he seemed able to bring Manchester United to its best performance, because we know that Ruud van Nistelrooy knows more about what Manchester United wants, honestly I doubt Ruben Amorim and I also don't know anything that Ruben Amorim has done as a coach and the achievements that have been obtained I don't know, but it all comes back to the decision of Manchester United management in developing and making significant changes this season.
Not dissatisfied with Ruud's coaching system, it's just that from the beginning the management only used Ruud to fill the coaching position temporarily after the club fired Erik Ten Hag. The management may not have initially thought that Ruud would make Man United perform well and they had already made an agreement with Ruben Amorim, so that the decision could not be canceled but maybe one day Ruud will be given the opportunity to become a real manager at Manchester United if the club's performance does not improve.