Do you believe that the type of person we are will determine the choices we make? Do you believe in fate? I think that Oedipus was responsible for his own downfall because of the arrogent, distrusting, and paranoid person he is.
"I Oedipus whom all men call the great," is just one example of Oedipus's Arrogence. He is very Ignorant and conceited as well. This type of personality contributed to his downfall. When the Oricale warned him, he could have very well avoided what was to come by making other choices. Fate is not to blame since Oedipus was arrogent and made the choices he did. He choose to go to the town of Thebes. He choose to kill his father. Fate is not to blame since Oedipus was arrogent and made the choices he did. It also took him a long time to realize what was happening. He was very dense and his stupidity lead to those choices.
Oedipus was also very distrusting. Oedipus is judgemental when he says "Yes, and its there you've proved yourself a false friend." He knows something is wrong, and right away he jumps to conclusions and blows up on Creon. He is not really sure of anything, but he doesn't trust anyone. This contributed to Oedipus's downfall.
ALong with distrusting, Oedipus is very suspicious of everyone. He is paranoid when he says "When he that plots against me secretly moves quickly, I must quickly counterplot. If i wait taking no decisive measure his business will be done, and mine be spoiled." Oedipus, being the paranoid person that he is, makes him more distrusting. He is worried about everything that doesn't matter and is too stupid to realize what is really happening. If Oedipus would have been less paranoid, then...