Answer: He is an enslaved person on a ship who wishes to die rather than endure the inhumane conditions he faces.
Olaudah Equiano, also known as Gustavus Vassa, was an Igbo (from the Igbo region of what is today Nigeria) writer and abolitionist. He was captured and enslaved as a child, and taken to the Caribbean thorugh the "Middle Passage," one leg of the triangular trade route between West Africa, America and Europe. He was able to earn his own freedom in 1766 and became a prominent figure in the abolitionist movement to end the Atlantic slave trade. His life is mostly known thanks to his autobiographical book The Interesting Narrative of the Life of Olaudah Equiano.
In this passage, Equiano describes the hardships that he went through while on the slave ship. He explains that the pain and cruelty was so huge, he wished to die.