When you come to Man United to be the most important part of the club then all the big disasters have greeted him since the first day. Anyone whether a player or a coach will have the same risk, it is difficult to develop, financial support is sometimes not easy to get and Amorim seems to show signs of stress. See the difference in his facial expression when he was still at Sporting and after becoming Man United coach.
I think the big problem facing Ruben Amorim at Manchester United is that the club fans wants to see him arrive the club and effect a big positive change upon his arrival. You can't expect a young manager like Amorim who was having an exceptional performance for his former club to come immediately improve the performance of a club that's been struggling for the last three years. They should give him the time he needs to improve the performance of the team and allow him take his time and build the team by fully establishing his style of football at the club.