Basically Ronaldo is no longer comfortable at Manchester United, for that reason I personally don't believe Ronaldo will give everything he can to make Manchester United rise. At least there is still time until the end of the month for Ronaldo to leave, because for me it will only be useless if Ronaldo is maintained and played from the early minutes because here Ronaldo doesn't seem to have any targets. So yes, even so, Erik ten Hag must continue to make Ronaldo the main player, because it is not appropriate for Ronaldo to be treated as in that match.
Regardless of what happened between him and the club I don't think he is that selfish. Indeed in this case for now he does not want to play at United but I think when he is confirmed to play his ambition will still continue to overcome his dislike of being at United. He is a robot full of ambition and I think he will continue his great form this season even if he doesn't want to be here.