The truth is that majority of the players at Manchester United are average players who can not take the team to where they are targeting. Amorin is not a bad manager if you read his game management but no coach will succeed dealing with average players. I hope he get the players he wants and the results will probably manifest. Most of the players aren't performing to the level of Manchester United standard.
You are right, Amorim also emphasized that it is impossible to appear to win the Premier League trophy if his players do not have the spirit to fight in every match. This proves Amorim dissatisfaction with Man United players. That is natural because Amorim has not recruited players according to his wishes. The January transfer market will be the answer, at least Man United fulfills Amorim wishes to bring in several players. But once again overhauling the United squad requires a process that is not easy.