The point is. If you want to be the best player in the world, don't fucking go from the highest level, to a weaker level. It's basics. When you aspire to be better, don't drop the bar. That's like the worst thing you can do.
Not necessarily.
No doubt Neymar has screwed up by going to France but footballers think very differently compared to spectators.
Apart from financial gain, players often like to go to certain places where they could show their particular type of talents. Neither Neymar nor Messi could flourish in the PL because for an attacker it is a meat-crunching machine, with raw and hyper-agressive defenders and bad referees. So if not Spain, usually either Italy or France remains the choice.
Neymar probably thought it will be an easy ride for him in France and he was wrong but not necessarily for the statistically dull rankings.
A Brazilian usually thinks differently from others. He wants to show how good he individually is.
He does that but of course simultaneously he wishes to win titles and trophies. But there is another factor, the commercial value of a player that shows in marketing values and the like.
Neymar is still the most expensive player on Earth and there's a good pragmatic reason behind that. His marketing value.
Wherever a player like Neymar plays, millions switch on the TV just to see him, his individual brilliance and qualities, regardless the results and the given league.
Until he got injured he also played brilliantly (and very productively) in the last CL, and you will never know what would have happened if those injuries avoided him.
The real test is: how many spectators want to see the player, and Neymar has broken all known records for that, even playing for PSG.
The same stands for Messi and Ronaldo, people just want to see them, regardless the league, and that what counts as fame and success, not only BDs and other individual or collective trophies.
If Manchester City play well, as they do now, people will watch some games of theirs but NOT because of Salah, Firminho or anyone else individually.
At present there are still three players who can bring neutral spectators: Messi, Ronaldo and Neymar, and just due to this, they are the ones having the best REAL marketing values of football.