Conte is still the best of several coaches in Serie A, but it seems that here he made a mistake by accepting Napoli's offer which did not fulfill his desire to make this club glorious again, Conte had asked for Lukaku a few months ago until now there has been no official contract to bring Lukaku, this is a difficult thing for him in Napoli, but I will not doubt if Napoli fulfills what he wants, it feels like they can still reach the top four, Conte is a typical coach who is hungry for trophies and he certainly wants to help Napoli but I don't think Napoli wants to help Conte.
Thus there is no other way but to play the existing players and the embarrassing defeat in the first half I think Napoli management is sensitive to losing three early points, because the lack of integrity in the front line makes them unable to do anything and they lose early points, now they must immediately end Lukaku to join in order to sharpen their attack line in scoring goals but if not this is difficult for Conte with Napoli.
Antonio Conte is certainly one of the best coaches around, of those who have won. However, Jose Mourinho was also like him and now he is struggling a little to make his strategy work. Many have understood his schemes and play in a way that invalidates his playing style. It could happen to him too, we'll see if he can do well with Napoli.