I've been reading a lot here that it's not Ronaldo's fault, he's put up good numbers, but somehow Juve have failed him.
I guess fanboys don't realize football is a collective sport, you need everyone to do their part not just hang by the goalmouth to tap in or shoot PK's. Football has moved on from the bonafide striker superstar - both City and Chelsea for example don't have any world class strikers, in fact they have very average to below strikers (by goal stats alone), but in return they work their asses off; pressing, rushing, hurrying, moving into space etc. Ronaldo's movement in the box is still world class and he's still deadly, but the moment Juve lose the ball he just becomes a passenger. This is not recent (he was like that at United), but he's taken it to a new extreme at Juve.
Juve haven't helped themselves with appointing Pirlo or not building their midfield at all, but Ronaldo is not blameless in their debacle of a season.