from what is seen that United's performance under Amorin has indeed declined, maybe that's why people have a different view, yes, Amorin needs to be given the opportunity to improve it again, maybe that's the right thing to do without criticizing first, and that's a tough task for Amorin even though he has tried, but everything takes time to maximize the existing performance.
This was inevitable, because Amorin arrived after the middle of the season, the squad was already formed and had some players who had problems and Amorin removed them from the team, making the remaining players on the team less motivated to play well.
Working well on the players' psychology involves spending a lot of time with them and to get good results it takes many years until a strong bond is created between the players and the coach. Manchester United must keep the coach for many years to have a strong and consistent team.