It's not nonsense. Neymar acted far more disrespectful towards the club than Figo ever did. The club had pampered Neymar to an absurd extend from the very beginning and Rosell was willing to use illegal methods and help ruin the club's reputation in order to buy that snake. Figo was an exemplary player and captain for 5 years. He was the most well-liked player. To this day he has hardly ever spoken badly about the club, rather the opposite. Anyway who knows his case knows that it was far more complicated than what the media has claimed afterwards. Basically Núñez lied to him and did not want to honor his demands and what was agreed on. Instead he preferred to honor Rivaldo's demands. The same player whose attitude was very bad and who ended up contributing to the ruin of the team not long before Van Gaal left for refusing to play where Van Gaal demanded he should play. This in return made the team worse as well. It began after the 1998-1999 season where Rivaldo played his best football using Van Gaal's tactics.
Figo's agent making a deal with Florentino, before his election back in 2000, was more a way to pressure Núñez to make him give the contract that Figo deserved and which by far the most fans (back then) wanted to see as well. None of them, including the media, ever believed that Florentino would have a chance against Sanz.
It is explained in detail here by one of the more popular local Youtubers who followed this case up close back then.
Anyway direct comparisons are irrelevant here really. Fact of the matter is that Neymar should have no place (ever) at this club after his scandalous stunt back in 2017. FFS, the guy has sued the club. Oh, and let us not kid ourselves that Neymar would not have moved to RM, if he could and they really had wanted him which I doubt that they do as they can probably figure out what a toxic personality he is.