I feel pity for Manchester United supporters because just looking at one you see a supporter who has lost belief and confidence in his team as well as lost their bragging rights to their rivals. For years now they have struggled to regain domination in the league since Alex Ferguson and all efforts seem fruitless. As it seems it will take the help of the most high to get out of their current situation.
Definitely the most high, because the situation of the club has grown beyond even the matter of coaches because I really don't know what the case is because almost all managers that have manage the club seem to be good manager looking at their coaching career and style of play but with Manchester united the case is whole lot different because nothing seems to be working at all and I bet even if amorim is sacked today and the next coach comes the case will still be same.
What happened to Man United in the last few years or you could say after not being coached by Sir Alex Ferguson, there were so many trials, even Man United slumped for years, not a short time. This is not the coach's fault because usually a team can slump like that always starts from the management structure and philosophy of the club's technical advisors. Then it spreads to the coaching team and players. So there is something wrong with Man United as a whole, not just because of the coach. If this is not resolved immediately, maybe this slump will continue. Even now being a Man United coach is one of the most dangerous jobs in the world, because it will ruin the coach's career.
Currently under the guidance of Amorim, in terms of the character of the game it looks good and the mentality has also started to improve, this can be seen when facing the leader of the standings Liverpool. In this match Man United's game began to look good and when they were behind they did not give up easily and were frustrated.
Sometimes we have to step back to try to move forward, there are times when we are at the lowest point, but if we believe in the process and are consistent in building a better direction in the future, believe that the time will come when Man United will be at the top again. So it's true as you say, even if Amorim was sacked now, it wouldn't make Manchester United any better.