I was thinking the same way until I learned that Ronaldo was brought to assist the team and not to do the overall work.
I'm seeing that the expectations is too much on Ronaldo's side and it's not too good. But What people will say isn't a problem, cuz it will have nothing to do with Ronaldo's relationship with the club as people already know his capability.
Ronaldo is only one player in a team with 11 players in each squad and he only contributes the best he can. However, it does not mean he is able to bring his club to success. Sometimes he can but we can not request him to do this every match.
Ronaldo did make some changes in Al-Nassr and for Saudi Professional League in general. He helped the club and the league become more famous globally especially in European countries. With his appearance in the league, many television companies decided to buy television rights of Saudi Professional League and broadcast league matches.
In Al-Nassr, Ronaldo did boost his team-mates to play with more seriously winning desire.
In PSG, Neyma, Messi and mbappe were brought for the same purpose ( trophy win) but if things doesn't turn out that way it still never mean they have failed.
PSG have more star players than Al-Nassr and they must play well even they don't have those trio super star players. I don't think a club with many star players like PSG can not win their matches if they don't have those three super stars in a match.