All three are reasons why Oedipus believes blindness is best. He sentenced the murderer to exile: as a blind man he can no longer rule, and will be expelled, no longer to see the Thebes he let down so badly, nor the children he begot in shame.
Not that he doesn't wish he were dead - he wishes he had died as was intended, on Cithaeron.
He thinks back to his supposed father, Polybus and his real father, Laius. "The blackest deeds a man can do, I have done them all."
Creon returns, now the ruler. What does he order his men to do with Oedipus?

• Kill him.
• Drive him out of the city.
• Take him into the house