In general, the players are more worthy of blame in terms of team performance and the results achieved by the Manchester United team at this time, but if they all still have the intention to improve the team from now on, I think everyone should not blame each other because they all still have good intentions to build the team together. And apart from that, Amorim as a coach must also have some new tactics to apply to the team because who knows with new tactics the Manchester United team can rise again from its current slump.
I think Amorim already tried every possible change he can, he rotate the players, he try to play with Academy players, he change the formation etc. But, Amorim should try to play with 4 defenders, they mostly play with 3 defenders and 4 midfielders, if the midfielders lost the ball, their defense wouldn't be strong.
If they play with 4 defenders, we can expect declines in attacking line, but it's better I guess, because Manchester United have higher total conceded than total goals.
I think it is unfair to only blame the players, I prefer to blame the whole team because this is their shared responsibility and no one should be made a scapegoat. Management, coaches, and players should be treated equally, and even if I want to be cruel, I prefer to say that management is to blame.
Keep in mind, their management has been widely discussed because they are considered unable to manage the club well. And if we relate it to what Ronaldo said in the interview that eventually became a problem, he also said the same thing.