I mean we can't really say that he was the sole reason for it, but we could say that he wasn't really happy about the manager and talked about that and after just a while he was sacked. That should be telling us something, doesn't mean that it was just because of him, obviously the management could be unhappy with the coach anyway and after the tie they were already considering it.
And to be fair he was playing too defensive for a team that dominated so well, I think this team attacking all the time with a fury, could have a lot better results. They have too many defenders and too much defensive approach, with a manager that could focus on the attack a lot and can use Ronaldo for bait, could have so many great results in the league very quickly.