What do you guys think about Okonkwo? He is definitely the protagonist, or main character, of the novel, but is he heroic?

Okonkwo is our protagonist and a tragic hero. He is proud, ambitious, and ill-tempered. Although strong and even stoic, he is a flawed human being. An ambitious man who has risen from nothing to a man of importance in his tribe, Okonkwo rules his family with an iron fist. He is deeply dedicated to the traditions and social hierarchies of his people, and he is determined that his sons and daughters follow his demanding example. The indignities forced on him and his people by the British eventually prove to be too much for him. After an act of defiance which goes unsupported by his people, Okonkwo gives in to despair. He kills himself, partly so that he will not be executed under the white man's laws and partly because he is grieving for the death of his people.

So Okonkwo father die in debt right so how did he die?