Kassai was at the centre of the controversy, giving Vidal a second yellow card despite the Chilean making what appeared to be a fair challenge.
Cristiano Ronaldo completed his hat-trick in extra time despite calls for offside, leaving Vidal infuriated.
"This robbery cannot happen in the Champions League, it was clearly noticeable and it starts to make you doubt [the game] a bit," Vidal said.
"We wanted to qualify and this gives us a lot of rage, that a match of such intensity can be decided by the referee.
"He was very wrong and that has knocked us out of Europe.
"When they embarrass you in this way it's very strong and it creates a lot of rage."