It is a shame, but culturally Brazil can't let the 60's go.
Americans may complain about their boomers, but American boomers can't handle a candle to the obstinate grip Brasilian boomers have on the brazilian imaginarium and culture.
Imagine if every single hollywood movie done nowadays was kind of a pastiche of Antonioni's Blow Up, and if the Grateful Dead were the great gatekeepers of popular culture. Every single new cultural movement either paid homage to their style and their culture or run the risk of being discarded. In a certain way, that's how Brazilian culture works. Add the fact that culture is highly politicized, because a big part of it needs to be financed by the state and you have the perfect recipe for movies like "The Secret Agent".
There's also a certain societal expectation that for being considered part of the elite you need to be thoroughly versed on the political and cultural dynamics of the period. If you are a Brazilian you won't criticize those productions, lest you be seen as the brazilian version of the "deplorables", and you don't want to do it in your urban professional upper middle classe environment.
And this lead us to another very common issue. As being well versed on the vicissitudes and cultural zeitgeist of the period is seen as an elite signal, th stories will always be hard to understand for the non-initiated. And this is almost proposital, a certain manner of gatekeeping, because, while brazilian cinema wants to make as much money as American cinema, it absolutely abhors the idea of not being sophisticated, full of hermetic references for the non-conoisseur.
Watch the other comments on this thread. International audiences feels lost, while the Brazilians keep playing softball amongst them while exchanging their precious references that nobody else knows, including most brazilian not privileged enough to have had money to do their basic education on expensive private schools and then conclude their education for free on high quality publi universities.