Personally, I think that even after the change of coach, there have been some positive changes in Manchester United's overall performance. Although Manchester United's team is not able to win. Even then, I think Manchester United's performance is a bit more organized now compared to the past. However, Amorim needs to strengthen this squad. Especially Manchester United's defense is still quite weak. Manchester United is failing to win because of weak defense. If Amorim is able to quickly find the reasons for the weaknesses of Manchester United's defense, and is able to stabilize the defense a bit, then I think Manchester United will win the upcoming matches.
The defeat against Nottingham made many people doubt Amorim. But yes, I also have almost the same opinion as you that Manchester United has improved slightly compared to when it was still coached by Ten Hag. Even though it may not be as good as when coached by Ruud van Nistelrooy, we can still say that Manchester United is slightly improving at the moment under Amorim's coaching. And the back line problem has existed since the Ten Hag era and it seems that this is quite difficult to overcome and find a solution. Because as far as I remember, even Ten Hag also failed to improve Manchester United's defense even though he had made many changes and various formations and even player rotations. And I wouldn't be surprised if Amorim also experienced the same difficulties. But we have to say that it was in that brief moment with Ruud that we really saw this team really improve. Unfortunately it was only a temporary moment.