The problem with Manchester United is that the coach is prioritizing individual happiness over team success.
I believe Ronaldo fans are all happy because they have gotten exactly what they wanted, they want to see Ronaldo playing all matches than Man United performing better with the good result without him.
Ronaldo needs to leave Manchester United by January because his impact on matches is no longer felt by the team.
I think it's not entirely Christiano's fault for the defeat suffered by Manchester United against Aston Villa, after all, it was an 11-man game. Cristiano had played optimally in that match and indeed the Aston Villa defender locked his movements very tightly. if given more trust then I'm sure Cristiano can come back to playing well again.