Ronaldo joining Al Nassr was a big mistakes as they'll be regretting not signing Messi which was their first choice. Ronaldo joined the club yet they couldn't win anything, they got knockout from cup competition and missed out of the league. Next season Ronaldo better helps the club in winning the league or he'll be cancelled meanwhile Messi will be celebrated and probably been made the ambassador of the 2026 world cup since he's now the most popular football player that's in the country. Already the club he signed for are getting positive returns from this deal as ticket for the full season are sold out at expensive prices.
I don't think Ronaldo has ever regretted joining Al Nassr they had enough good intentions so it was their choice, I know Ronaldo still failed this season because he couldn't bring any trophies and this club failed in all competitions but that doesn't mean Ronaldo has regrets because that and of course he has made a lot of contributions including to the team and also the fans are glancing at this SPL league.
About Messi it has been his choice to Inter Miami but I have never heard that he will be the ambassador for the 2026 world cup later even though it is very close to him, the real thing that Messi earns more money is that there are several clauses from other sponsors who are part of Messi.
Yeah Inter Miami has been selling tickets more expensive than usual but look at Al Nassr has sold a lot more jerseys including the broadcasting rights of the SPL league now it's even more extraordinary because of Ronaldo's popularity.