It's an interesting one.
I used to think like that - that football is all sophisticated nowadays and every team has to strive to be like Barcelona, the epitome of everything that is good about football.
The fact is that defenders at the top level are all roughly equal and Barcelona's style is never undefendable, it's always possible to stop their goals and they win games with patience, waiting for the opposition defence to make a mistake. If the opponents don't make a mistake, they don't score. Their game is actually quite defensive, it's not attacking at all, it's conservative. Whereas teams that are more direct and counter attacking like Real Madrid and Manchester United, it really is impossible to prevent some of their goals. Ronaldo is just one of those players, he is such a superior athlete and so fine tuned that he can cause problems that are impossible to defend against. Realistically, I don't think either approach is superior anymore.
It's also interesting to contemplate what Ronaldo would have turned out like if he'd joined a possession club rather than Manchester United. He really was quite a technical player in his youth, and I don't watch him much anymore but am I right in saying he rarely dribbles past players anymore? Ferguson changed him so much. For better or for worse? Who knows.
I don't know for sure but I don't agree that you can definitely conclude that Ronaldo is overrated.