As for the Manchester United encounter against Southampton, I feel more credit should also be given to Andre Onana too, the young man made some brilliant saves that allowed Manchester United to stay afloat before Amad Diallo's goals starting coming in, however it was one of the most surprising and iconic 12 minutes of play I've seen in football in recent years. Manchester United could have all the ball possession and might still lose the game, so for the fact that they came with those number of goals in a short time was the masterclass for some of us, especially the fact that it came from a single player.
As their head coach Amorim said in an interview, this season will be too wild for Manchester United and they will have to fight in every match but results will be too wildly change from good to bad. He also said that Manchester United players are more familiar with counter attacking tactics and are not familiar with playing as a stronger team against weaker teams.
They will have to change it in training sessions but results won't quickly be good, so this season will continue with many surprising results from them. Let's be ready for disappointed results from them, when Amorim is still working to improve their players and operations of the team especially when they have to play proactively attacking.