It is doubtful whether Chelsea will get anything better if they add Ronaldo to the team. Because Ronaldo does not have a place in the starting eleven in the national team, due to his poor form. In fact, giving a name can never survive. So the money that Chelsea will buy Ronaldo with, will benefit if they buy two or three other players.
Can we really say that over one match! Like, Portugal has played 4 games so far in the world cup and Ronaldo has featured in all 4 games, only coming out the bench just once and that's was in the knockout against Korea and someone, he's not a first team player no more, that's hilarious to me.
Ronaldo in Chelsea, I don't think he would do badly. His got all the motivatioms he could get. A team hedged on him, a team aging in all the leagues he loves, the world looking on him with expectations and that's enough to make him want to improve on his performance, help the tea and make his fans proud. He could still do that.