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.
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.
I am not talking from the perspective of a particular fan base. I am talking as someone who understands rules in soccer, playing myself and watching the games. I have nothing against Real Madrid, I admire their midfield and the various individual players for their achievements like Ronaldo and many others. But the video I shared really is showing horrible referee decisions. More horrible than I have seen for any other club to have been lucky due to wrong or bad referee decisions. That video is insane. i think it is superficial to say that a goal is a goal when the referee awards it. When a goal is scored against the rules and decides a game like a final in some of the most important competitions, it is wrong. It is not fate, it is wrong. In a league luck usually evens out over the course of a season, in World Cups and Champions League games it often doesn't.
You are trying to reduce everything to individual episodes (mistakes happen everywhere and against everyone), and I am trying to talk about larger things. If you are not a supporter of conspiracy theories, then you must agree that mistakes are everywhere and that well done who, firstly, was able to take advantage of them, and secondly, created those potential opportunities where they arose - after all, if Real Madrid had not attacked, then 100% there would be no those errors. But Real attacked and looked for their chances. The World Cup and Champions League have more variance (and more error impact) as they are short tournaments with a playoff stage, but things even out in the long run.
You can have your opinion, and that is totally fine, but if we want sports to "may the best win", we need the hawk eye in tennis and the VAR in soccer. The reason is simple because the better the players, the less accurate can referees be. If a player touches the line in tennis dozens of times during a match (and this is what we all want, the maximum limit in quality), a referee will need assistance to make the right decisions. Here we are talking about defending three titles in a row and you can say whatever you want, but this streak of errors being decided in favor of Real Madrid is unprecedented in my opinion and it is not issue if we are talking about a wrong corner or throw in, but we are talking about offside goals, red cards and brutal injuries when Ramos took Salah down like a wrestler. If you call wrestling in soccer "a potential opportunity", so be it. I call an offside goal an offside goal and a red card a red card. It is pretty well known that Casemiro, Pepe and Ramos are among the most brutal players out there. Genius and brutal at the same time.