Zidane spoke separately about winning the Champions League three times in a row and he claimed that it was the result of his hard work (which exhausted him and deprived him of sleep), and no luck. I agree that there is a share of luck everywhere (in fact, this is just a variance of a random variable, speaking in the language of mathematics), but the strongest are lucky and you should not underestimate other people's merits 
I am not underestimating other peoples' merits in the slightest, but don't we agree that goals like these won Zidane the Champions League? Also watch this one at the 2:00 minute mark. I am ready to receive and have a look at counter examples where the referee decision was clearly made against Real Madrid and cost them the game. But I tried to find a summary of decisions that were against Real Madrid and I couldn't really find something that was blatantly obvious against Real Madrid and decisive for the game end result. Almost all of those decisions that led to Real Madrid advancing through goals and red cards would not happen these days with the VAR. Almost none of them.
Maybe there were no "decisive" mistakes against Real, since Real turned all the mistakes against themselves into insignificant by winning with a convincing score?
Believe me, I am very familiar with the topic of refereeing mistakes (opinions of various fan bases), I know such terms as Evrebelona
and others, but I see no reason to discuss all this - mistakes and even conspiracies are part of football. And in this imperfect football, Zidane won the Champions League three times in a row. When someone appears who can repeat this, it will be possible to compare their “purity” or some other secondary indicators, but now Zidane is one and this is a great achievement that cannot be underestimated.
Mistakes are bound to happen and this is why we are human because we are imperfect being. So I don't see any reason why we should use our mistakes to judge our achievement. FIFA has seen these mistakes several times and that was why VAR was implored to football to correct most of this mistakes done by human.