Perez has always been lucky, remember when he sacked Ancelotti in 2015, already a questionable decision, and then hired Benitez, who obviously was never going to work out here?
Well, everyone has forgotten about that now, since Zidane came in and salvaged the situation, but people were quite mad at him at the time.
That is not to say Perez is a bad president, always said he is good at handling the economic situation of the club, but a footballing genius he is not, things are better when he doesn't get too involved in that aspect.