This result is not too disappointing considering that Arsenal is not a weak team, conceding one goal is very normal in a big match game against opponents whose strength is almost equal. Amorim needs to sharpen their attacking line in the next match because based on the results in the first match, their weak point lies in their inability to break down Arsenal defense.
It shouldn't be too disappointing, as Manchester United fought so well against Arsenal, and even the goal wasn't a player's fault, so there's nothing to comment on. The midfield needs to be more creative in creating chances so that the strikers can score more easily. These weaknesses must be addressed in the next match so that Manchester United can perform much better. The defeat against Arsenal wasn't too painful, as Arsenal were far superior in every aspect, so losing was a natural outcome.