On the subject of team building, here are the (notable) players bought by managers at Real Madrid and Chelsea.
Real Madrid
Mourinho: Di Maria, Khedira, Carvalho, Ozil, Varane, Modric, Lopez (goalkeeper)
Ancelotti: Casemiro, Carvajal, Isco, Bale, Kroos, James, Navas, Chicharito
Benitez: Casemiro, Asensio, Danilo, Lucas Vasquez, Kovacic
Zidane: Morata
So Zidane has literally added nothing in terms of improving his squad. All of Real Madrid players who contributed to success since Jose's time there were bought by Jose, Ancelotti, and Benitez (who was laughed out of town, and look at the players he bought). To Zidane's defense, he hasn't had a need to buy any players, but to give him all the credit and none to his predecessors is ridiculous.
Chelsea
Mourinho: Pedro, Diego Costa, Filipe Luis, Fabregas, Matic, Willian, Schurrle
Conte: Kante, [Irrelevant point], David Luiz (these are the ones bought in 2016 who won the title)
So the core of the team that won the title with Conte was bought by Jose, and Conte added a couple of very good players. Once again, to give Jose no credit is plain out ridiculous.