the most absurd of all the arguments. "he challenged himself. and he was successful at it too." as if messi was unsuccessful. 10 seasons in la liga, 2 titles. 7 barca, 1 atletico. there's cl success. real madrid won it 2 more times after ronaldo left. ronaldo didn't win anything. he went to a juventus that had been champion 7 seasons in a row in italy and that played a cl final and a semifinal the following year. is this challenging yourself? juventus, who played a cl final, got knocked out in the round of 16 twice while ronaldo was there. the first year to ajax, the second year to porto. the argument they call "challenging himself" is hollow. it's not substantial. as a matter of fact, in 2…