A few points:
- comparison with failed United managers of the past 10:years seems irrelevant - we are not competing against Ole, Jose, LVG etc
- exceeding expectations this year- true but no one saw Liverpool’s collapse or Chelsea’s further descent into a circus
- winning the Carabao Cup was a notable achievement
- the third best team in England should not be losing comfortably to the 15th best side in Spain
In conclusion, while there have been some high points and the results have been generally good, criticism of the manager is not unwarranted. He still has to prove that he can compete at this level (and the club has to prove that it is willing to compete through spending).