God, this was awful. I wanted to punch that hateful little shit of a narrator/main character/Pessoa on the nose within the first ten pages of the book.
I get that the cynicism is an expression of the guy's struggle to find something to value in his life, but that doesn't make him a metaphor of the modern literary hero or indeed anything I can value.
Apparently, a lot of people have found some deep insights in his ramblings. Good on them. To me, the narrator's (or Pessoa's??) ignorant, arrogant, disdainful stream-of-consciousness blether held more cliches than a piece of hackneyed journalism, signifying nothing.
And if the intro to the book is correct and the MC is an alter ego of Pessoa himslef (who hadn't actually published this in his lifetime), then that is rather sad.