Cristiano Ronaldo's burden at Juventus is indeed so heavy because his presence is expected to bring Juventus to achieve something they really want. But unfortunately that didn't happen, but even so it wasn't Cristiano Ronaldo's fault who couldn't bring this team to a higher title, but indeed the whole team didn't have the mentality for that.
Juventus desire to win the European competition again forced them to spend a lot of money to buy Ronaldo from Madrid, but the expectations they hoped for could not be fulfilled for four seasons with the ronaldo, I don't agree if you say Juventus has no mentality in European competitions, try to look at the history of juventus before the arrival of ronaldo wasn't juventus able to reach the final twice, once stopped in the round of 16 and once in the quarter-finals?
but when Ronaldo came, Juventus performance in European competition was quite bad, 4 seasons with Ronaldo, Juventus were not even able to get past the quarter-finals.