A few thoughts:
1) If he isn't 100%, he needs to rest. We're in a good league position and we've qualifier for Champs League. Portugal has qualified for Euro. If he needs to take 2-3 weeks off to recoup, he should, because a healthy Ronaldo is a monster in knock outs.
2) He needs to accept that he isn't the player he was 3-4 years ago. He's a great player, but he isn't immune from substitution like he was in the past. Given the depth Juventus has, and the need to occasionally switch tactics, he can't scowl or leave the arena every time he is substituted. What would be worse is if we started making decisions in order to keep him appeased rather in the best interest of the team (something we've been doing since his arrival with respect to free kicks). Eventually there will be a point that he isn't good enough for a team ( I don't know when), but coming to terms with that is important.
3) I think our playing style doesn't play to his strengths.
- Unlike Messi who excelled in possession based systems, Ronaldo has typically played with more pragmatic coaches or that utilized quick counter attacks/ favoured direct attacking.
- Ronaldo has scored a lot on through direct attacks/ quick build ups. With Allegri or Sarri our build ups are slower; however,
- Allegri defended deeper and focused on less on possession so I think CR7 found a more opportunities.
- Generally speaking though in Serie A there 2 things that are very common: 1) build ups are often slow 2) teams defend narrow & deep (particularly against us), leaving much less opportunity to run into dangerous space, which Ronaldo has thrived on in recent years.
- At Real Madrid in particular so many of his goals were scored while his team was attacking directly/ in counter attack. Those opportunities simply don't exist to the same extent in Serie A.
- In the past, he was more agile on the ball and could dribble past players with more ease. As that ability has declined due to his age he became more of a striker who attacks space (because despite less agility, his sprinting is still exceptionally fast). Unfortunately due to the style of defending in Serie A, there is much less space to run into.