In last decade and even longer, Manchester United was completely a newbie on transfer market by purchasing players with super overvalued and expensive transfer costs. It is more painful as later they did not use those expensive players well enough and made it like doubled failures.
All clubs can make transfer mistakes that barely happen while with Manchester United, they have been doing this in many latest seasons. Hence, it is no longer mistakes but more likely severe systematic problem from their club strategies for development and necessary actions on transfer market.
Manchester United have spent a lot of money in the previous transfer market and almost most of the players they have have not been able to develop well under their coach.
If you say the players are problematic, maybe they will not play well when they are loaned to other clubs and I myself do not know where the problem is.
Amorim is a little more careful in recruiting the players needed and he is not in a hurry to show interest in one of the players who is considered suitable to play with his strategy.
We hope that next season Manchester United's performance can be much better and even though they cannot compete for the title, at least being able to catch the top five is more than enough.