Sergio Ramos was sent off during the seven goal thriller.
"It was tough game. There were some people that didn't want us to win or see Barça out of the title race. I've been here for a long time. It obviously bothers people when Real Madrid win. It makes them jealous. There isn't a level playing field," Ronaldo blasted.
"The referee made so many mistakes. They have to assign a referee who lives up to the game's importance. He was pale and very nervous. I'm not trying to justify myself. There were a lot of things. Some people wanted Barça to stay in the title race and they did."
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