I think we can say without any element of doubt that Ten Hag asked for every signing before last summers transfer except for Casemiro (because he wanted De Jong instead), who signed them off is a different matter, but these are the players Ten Hag wanted for sure which shows just what a terrible judge he was, and if he'd had his way we'd have got Arnaoutovic, Timber, De Jong, and Amrabat permanently as well.
We can't now say Amorim shouldn't be allowed to rip it all up just because Ten Hag messed up so badly, the only alternative is to sack Amorim now, and get a manager in to play to strengths of our current squad, which we already know now isn't good enough for anything other than scrapping for top 6, and a flucky cup run.