In the youth categories the fundamentals gave way to tactical training, we don't see as many young and extremely skilled boys emerging as in the past.
Teamwork is great than a one man army squad where one star player is greater than other players in the pitch and they cannot corroborate the effort of the star player with good teamwork support. It is the easiest way a club can overwork their star player and produce little results.
A typical example stems from the Portugal National Team where one of the G.O.A.T player of football history, Cristiano Ronaldo struggles to win the trophy but cannot because he's literally the biggest player there and others cant measure up their performance with the star player. I had adviced long ago for Portugal to look for great performing players to form the first 11 squad.
Now I think they're trying to build up the squad with the coming of the likes of left winger, Joao Felix of Barcelona, attacking midfielder Bernardo Silver of Man City, Nunes of Man City, Reuben Dias of Man City, and Pepe amongst others.