What do you expect Ronaldo to do when Mourinho plays such defensive football? You could see Ronaldo trying to get Mourinho trying to change the tactics to something that would suit him. Ronaldo can't save Madrid all the time.
I expect Ronaldo to do more for the team than simply dive, moan, hit freekicks into the wall and take ridiculous 40 yard shots. Honestly, his work rate was dire. He could do something useful - hold up the ball, perhaps? He has the strength for it. - and adapt to the system, rather than moaning that the system doesn't suit him. Truly great players find a way to look good at any time. Messi, for example, was man-marked even more fiercely (and by a better defence and more defensive midfield, at that) than Ronaldo and still managed to turn the game completely on its head.