The truth is I don't know how the MU allowed itself to be fooled by ETH at that time, however as I said before, for me he was the destroyer of the MU, and he caused so much damage that the team still hasn't been able to lift its head up, it's difficult to lift a team when it's like this, however for me Amorim has done what he could, what I didn't like was his treatment of Garnacho, it's not the way he did it, but those are very internal problems.
I believe no one is capable of knowing the future that is why Manchester United were unable to see that Erik Ten Hag would only make things worse. However Ten Hag did what he could which obviously wasn’t good enough and put the team in further trouble. Amorim is here now and has the opportunity to change things, hopefully he would be able to do so.