I agree with you, but there is one other thing that may be difficult to say about Real Madrid. In my opinion, Real Madrid is the most influential big team in Europe, I mean sometimes referees tend to make decisions that favor Real Madrid over their opponents and this is the part that is most difficult for most people to admit. Only those who are neutral will admit it, while others will likely deny it.
I know that referees are human beings who cannot fail to make mistakes, but sometimes their leadership in matches involving Real Madrid is very unfavorable for the opposing team. There are some decisions that can be controversial at times, these are the influences I mentioned earlier.
The referee's decision is inviolable although I see where the referee's tendency seems to favor a team, this will be difficult to prove if the referee is cheating.
Even if the referee makes a mistake, they will not admit it now but after a few years or he has retired then he will reveal all his mistakes, this I saw several referees who have retired admitting to making mistakes.
You still remember the Barcelons vs Chelsea match - I don't remember the year, but the referee seemed to favor Barcelona.