With Manchester United it will be different, the pressure is higher and also Man United is a team that has been slumping for a long time and even for several seasons and some coaches have not been able to meet the expectations of fans and also the targets of Manchester United management.
Ruben Amorim has indeed shown that he is a quality coach with Sporting Lisbon but I doubt that he can do that right away with Man United, maybe he needs more time to adapt to build the Man United team and certainly this is not an easy job for Ruben Amorim.
The hopes of the Red Devils fans are of course that Ruben Amorim can revive his beloved team and return to a performance that matches its nickname, but it is indeed not easy to bring a team to experience drastic changes. Previously they experienced a slump that was indeed quite bad and detrimental to them, and I think Ruben Amorim will not be able to quickly bring his team to a consistent and better performance, it takes a long time to adapt, this is a natural thing.
The fans of this team have high hopes for Ruben Amorim to be able to make his team rise with good performance and shine in the EPL.