Don't want to be too arrogant about Man United's first victory, I don't know whether it will really improve with the dismissal of Ten Hag or will continue to worsen in the hands of R.V. Nistelrooy, Man United must find players who are better than the players after Ten Hag left because it will later be a boomerang for Man United, in my opinion the players brought in by Ten Hag did not make any impact for Man United, in fact they get a fairly large salary but do not contribute to winning every match, maybe all supporters of R.V. Nistelrooy who currently serves as the head coach of Man United can bring Man United to their top caste in Europe and the Domestic League.
Ten Hag has indeed brought many players to Man United and if the reference is to how Man United is currently performing maybe his players didn't make a significant contribution, but that doesn't mean they are completely incompetent players because what I think is more appropriate to blame is the coach's strategy. Maybe there are some players who have failed at Man United, but I don't think that's all the players that Ten Hag brought in.
I think Ruben Amorim will definitely be able to choose which players he will include in his plans, and who might be sold in the next transfer window.