I don't know for sure but I think Ronaldo is still without a major success in the Saudi Professional League, isn't he? I am not talking about his individual trophies as best goal scorer, but did he win any important titles there so far? I remember when I thought that Al Nassr must be the Saudi super power club when they bought all these players, but it looks as if the league is more equal among the teams than I thought at first. He probably isn't too happy about Al Nassr's overall performance, but his salary probably dries the tears. 
Not having to win the major trophy is not just enough reason to think that Ronaldo has not been successful in the Saudi league, I know success is often measured by the trophy a player has gotten over time but then again there are times when a players effort becomes clear that they have been their best but may just not be lucky but Ronaldo has achieved over a 100 career goal at the Saudi league so far so he is doing well although I wished for him to win this title but anyways congratulations to the winners already.