The quality is far below what the Brazilian team was in the past, today we no longer have differentiated players like we used to, we only have good players and nothing more. Neymar could be one of the greats, but he chose to be a celebrity instead of a professional player, today he is over 30 years old, so the best phase is over. There's Vinicius JR, who I think may be more prominent in the future, but nothing compared to Ronaldo, Romário, Ronaldinho, Rivaldo and so many others.
Yes you are right and I agree with you. Brazil's best era is over. This is very sad because Brazil is famous for its many star players from the 70s to the 2000s. Many names of Brazilian players have become legends in the history of world football. But at the moment to be honest, I don't even know most of Brazil's current squad. Maybe I don't follow football news regularly, but currently only Vinicius Jr. in my opinion has the level of Brazilian players of old. Although Vini will be great but without the support of the other brazilian players I think it will be difficult for brazil to even try to progress from the group stages.
If Brazil passes the group stage it will be with great difficulty or if they fall into a group with weak teams...
I also don't know several players from the Brazilian team, and that means that if they were good enough we would naturally know them... The Brazilian team is very bad and has serious problems: in terms of skill and prominence, only Neymar (injured) and Vini Jr... but other than that there are no stars or players with good tactical consistency.