At the very least, if Amorim doesn't make the expected improvements over the course of a season or two, then it's very likely that Amorim will end up being sacked as well as previous coaches.
Manchester United is really in a big mess, and Amorim didn’t meet the team in a good way, so all I will say is that Amorim needs to be given time, we don’t just expect him to fix everything within a short period of time, it’s going to be a gradual process, because even if Amorim will be signing new players, we don’t expect him to sign all players at once, so Amorim should be given enough time.
I have seen some Manchester United fans that are already complaining about him, that he should stick to the pattern that Ruud van Nistelrooy was using, that the players are not used to the current pattern that Amorim is playing, which is a wrong idea. The coach will be staying in the club for a long time, so we expect him to play the pattern that he knows best and not have to copy other people.
It’s just too early to start complaining, let’s just allow the coach to do what he knows best, and we shouldn’t expect instant changes in Manchester United’s performance, but with time, things will be better.