Its more complicated than that simple blame the coach. Brazil been on a turning point for long, but they are too scared to move on. Each world cup they come with a philosophy completely opposite of the other, its mentality! 4 years later its technique! 4 years again its mentality all over again! Or lets open for media lets open our practices we are happiness we are joy, 4 years later lets shut it all we are serious and so on.
The media is a reflect of the fans, contrary to what most people think, and its about time both to either buy on the seleção or shut up. We can have this we are supporting the 'raça' style then on the first ball a guy can't control our reaction to be ooooh that guy sucks, lets call that whatever kid. Or the opposite when we have a bunch of super technical players that don't run and everybody screams wheres the passion!
Here is the thing, that's pretty much every fan/media nowadays, we are no longer the football nation, and its about time we realize there are other nations are just like us regarding this beloved game.
Here is where the more complicated I said above, gets simpler. We are not that special football nation anymore, we are just another team, and we are not good enough right now.
Its very simple actually, other teams are better than us, just that. I could safely say that every brazilian club is on the same position of the Seleção, we have no strikers and playmakers.
Cruzeiro, arguably the best team last year, had to rely on a old man Borges, cause he plays old school striker, but he can't stay fit, and believe me we tried a bunch of more 'fit' and even 'better' players than him there and none of them worked. We were developing a young man at the striker position, but he was already sold, cause good nine's are rarity in the whole world right now, and we are developing a good deep playmaker, but he is probably out this summer too.
That's the reality, we are nothing special at football anymore, we just try to develop good players too, so either the media/fans buy mediocrity and try to slowly improve it or we will just have to wait for a better generation of footballers.