The film well is directed and bold for Brazilian standards, although could be more daring, but the script is weak, an attempt to create a Brazilian "Clerks".
The characters are ambulant clichés, without inspiration, and no personality, changing with the necessity of the director to show some emotion or feeling. Any another character besides the two main ones simply shouldn't exist
they only interrupt the narrative in a tiring and boring way.
But the film really loses with its pop references. They are pathetic, out of context, and extremely dated (the joke of the Dick Dastardly - Dick Vigarista - must have 20 years).
There was no effort in fusing the references with the script, they are just tossed in, as a "Top 10 Cliché Nerd Jokes" in a internet forum. And these jokes have been around for years
simply throwing them in a film script is to offend the viewer.
My guess is that the movie was only praised by older people (that doesn't know these jokes) and by die-hard nerds (that went "OMG, a Transformers joke!!!LOL").
The ending just show how hollow the characters are. Since they appear to have no constant personality, is impossible to figure out what the ending was supposed to mean. And it was done way better by other movies.
Although brave, the attempt to "portray a generation" , as the movie was sold, its only a weak, "wannabe-cult" version of "Malhação" (brazilian long-running soup-opera about college years).