Did anyone expect results from Amorim already this season? The management snatched him in the middle of the season, but not for emergency work, but for work with a long-term perspective. He wanted to join United in the summer but was given a 'now or never' offer and it was clear he had some counter-conditions. I am sure that he has at least one whole season (next) to show what he can do, plus if he cannot conduct a normal transfer campaign due to lack of funding, then I don’t even know if it will be possible to make any claims against him.
Amorim was brought in for longterm and he will have 2-3 seasons at least. He got the position in the worst possible time and with this kind of players he is doing the maximum. If he is able to win the europa league this season will be a good season for them. This is the only thing that can save their season so far. Even if he dosent win it i dont think he will be sacked.
The Europa League this year for United is something that can turn the season around and turn it from unsuccessful to successful, since getting the title + a ticket to the Champions League while being in the bottom half of the standings is the maximum possible. Thanks to the new format and low competition, this is quite possible - United's chances are currently estimated at around 18%.