it must take a long time for ruben amorim to reach the level of sir alex ferguson, because he has only just taken charge of manchester united, and it's too early for us to conclude that he can make such a leap immediately. the point is, if ruben amorim can improve the team's game structure and maintain consistent performance over the next few seasons, then he should be able to replicate the glory manchester united experienced under sir alex ferguson. but that’s only if he can, since it's not an easy task, given the immense pressure at manchester united and the consistently high expectations from season to season. he needs to be able to stay in that position and keep improving in order to achieve that.
Even Amorim stay in Manchester United for 26 seasons, I doubt he will get the same achievement as good as Sir Alex Ferguson. He's not able to manage the team, that's why the old players are still act the same like the previous manager.
I think it's because the old players didn't see the results during his management, hence the old players are no longer respect to him.
This is what makes it difficult for any Manchester United coach to improve the team, as they are constantly being pressured to match Sir Alex's success. Logically, this is impossible to achieve in a short time, especially since United is already in disarray across all aspects, including mentality, players, internally, and the dressing room.
When it comes to managing players, I think Coach Amorim is more assertive than Ten Hag. So, I'm a little optimistic that Amorim can do his best for Manchester United if given time. When Ten Hag coached Manchester United, it's true, as you said, that the players didn't respect the coach, but under Amorim, that's not the case because Amorim is a bit more assertive. When a player isn't performing at his best, he doesn't hesitate to bench them. We'll see how Manchester United progresses next season. If they're competing for the title, they're not ready yet, but if United can compete in the top five, that would be extraordinary progress.