Luckily Man United only faced a weak team in that condition because if they faced a much stronger team then I am sure they would have suffered a deep defeat. However, this is the best result that Man United has gotten because even though they played with 10 men they were able to get three points and there is still a lot of work that Amorim may have to do considering Man United's inconsistent performance in the last few matches.
Facing Arsenal at Old Trafford in the next match will be much more difficult because a number of main players are injured so Amorim has to think about the best strategy. Arsenal will definitely chase three points at Old Trafford so that when Man United is off guard it will make a big loss
I don't want to underestimate Man United can win with 10 players with a weak team or with a team in the relegation zone but I see the mentality and spirit of the Man United players in this match to get three points. Even though they only played with 10 players but they were able to win of course this is extraordinary at a time of unstable performance, this will raise the spirit of the players again in the next matches, and of course this victory also adds to Amorim's confidence who we know in the last few matches has performed very badly so that it makes him full of pressure. I don't expect much from Amorim this season, he just needs to stay away from the relegation zone that's enough. Keeping him might be more and I'm sure Man Utd will feel the results if they can keep Ruben Amorim. It's difficult for the rest of this season, but things will change starting next season.
This manager will change Man United, but he will need a lot of time. This club is really in trouble, not only financially, but also on the field. Problems like this can't be solved by becoming a manager's graveyard. The club needs stability. So Amorim must make this winning moment to continue the good trend in the next match before the match against Arsenal, Man United will first face Fulham in the fifth round of the FA Cup and Real Sociedad in the Europa League. If they can win both of these matches, it will be a good capital to face Arsenal in the 28th week of the EPL.