Zidane is criticized for rotating too much, not buying replacement for Morata and Pepe. I doubt that was hic decision to not buy, also i thought he rotates due to injuries?
I think a lot of Madrid fans dislike that his go to option to sub out is Isco, whereas players like Bale and Benzema get chance after chance even if they deliver little.
Indeed, it makes you wonder why Zidane prefers a pace merchant (Bale) to a player who is much closer to his ilk (Isco). You'd think given his own playing style, if there is a single player he should build around, it is Isco.
Zidane is one of those weird cases. He seems Spanish, but in fact more French if you look at his insistence with his French players. Doesn't seem to value the locals as much as fanbase does anyway.