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.
Manchester United rarely scored even when they used 4 midfielders. Ithink moving one to the defensive line give no change. It's time for Amorim to stick with the new tactic. The better he explores a new strategy that can fit his team well. 4-3-3 can be a good choice for him.
The only problem is that Manchester United players sometimes being so clueless about what they should be doing. The player's skill is also giving a lot of impact to the how successful Amorim's tactic.