Amorim joined Manchester United at a very wrong time, he was signed to bring glory back to Manchester United when Ten Hag has already ruined the team, it is becoming difficult for him at this moment because of the standard Ten Hag set before leaving which he need to put extra effort before changing to a better pattern he is used to.
Manchester United fans needs to be patient, they hyped Amorim too much and he is good, but it will take him time to perform to his standard because he is a good manager that can do well if given time and money to sign players.
I think it was the right time for a top talented coach like Ruben amorim to join Manchester United and use his technical skills to be able to salvage Manchester United season. Manchester United's fans should understand that the club is in transition and it will take time for Ruben Amorim to be able to put the squad together. It will be years before they can compete for major trophies consistently.
Inconsistency is a consequence that Manchester United must bear because they changed managers in the middle of the season. Indeed, Manchester United fans should be patient in facing this transition period, and give Ruben Amorim proper time to prove his managerial qualities. Of course, everything must go through an adaptation process, Ruben Amorim's performance at Sporting CP cannot be used as a full reference, because everything is very different when coaching Manchester United.
Maybe next season Manchester United will perform to meet expectations, after Ruben Amorim built squad depth that suited his game plan. This season, if Ruben Amorim fails to lead Manchester United to finish in a better place than last season, I don't think he can be completely blamed. To save the remaining opportunities, and increase strength in the second half of the season, the management and club officials must be active in the January transfer market.