Of course I will respond from a Buddhist viewpoint. All he pondered was helpless confusion. He didn’t  see a way out of his philosophical depression and pointlessness and seems to be a nihilist in alluding that it all ends in death. Later generations may appreciate his writings but he says that as a dead man he wouldn’t be around to enjoy their kinship. 

To the contrary, the Buddha expounded on impermanence and not-selfness while stressing  the crucial importance of one’s actions which shape future existences and when done skillfully, enable one  to escape rebirth and dive into the state of eternal peace. 

Pessoa didn’t see a way out. I found the whole presentation to be depressing and neurotic.