We can't compare Pele, Ronaldinho, Ronaldo, or other similar players with Neymar, they played for their national teams for a long time and they earn many achievements also compared to Neymar these players had much better performance and they had more stability while a player like Neymar can't have weeks of good performance and then just like this year, he can disappoint while the team.
I think the generation of golden players in Brazil is over and that's why they couldn't earn many achievements recently in the world cup.
A few decades back, teams like Brazil and Argentina were ahead of the other teams in terms of quality of play. But this gap has disappeared now. Also, the local leagues in these countries are not of high quality and therefore the players opt to play for European leagues. This is having an impact on team bonding, as nowadays the players remain with their club for almost the entire year. International matches are given a low priority when compared to club matches and even while participating in national matches the players are very cautious to avoid any injuries.
In the last World Cup we saw that the players who sat on the bench in Brazil were the most expensive players. That is, compared to the value of those who performed on the field of other teams, the value of those who sat on the bench in Brazil was much higher. The 2022 World Cup in Qatar was a tournament full of potential for Brazil but they did not do well in the tournament despite having so many expensive players. By far the most Brazilian stars are performing for various European clubs. But even with such good players, they are not able to contribute much for the team. Maybe because of playing very few matches for the national team, these stars are not able to contribute much to the team's victory. If more friendlies are organized then Brazil will do much better in major tournaments.