I agree, for even if you re-watch the match it is clear that Arsenal were superior to Manchester United at many points, so the fans' outrage is nothing more than frustration at the defeat. After all, even assuming that their goal would have counted, it wouldn't change anything, for the score is 3-1
After this defeat, we don't know what steps will be taken by Manchester United, bearing in mind that the UCL competition awaits this month which will make us even more doubtful, because with conditions like a match against a club like Galatasaray, it's definitely not guaranteed. To be realistic, I think it will be difficult for Manchester United to qualify for the group stage. Even Copenhagen and Galatasaray can be far superior to Manchester United. Bayern Munich doesn't need to be counted 