He is too arrogant to admit his errors and attempts to take it out on the blind soothsayer.
The result, then, is the prophecy fulfilled and Oedipus blinding himself before wandering aimlessly through the land.
If you go by Aristotle's "Poetics" (the most famous text written about Greek tragedy), Oedipus (in Sophocles' "Oedipus Rex") is given as an exemplar of the tragic hero.
He is a man of high standing socially (King of Thebes), intellectually (he is the great solver of riddles) and morally (he is determined to find the murderer and end the plague on his people).
He wants to untie the puzzle, but he actually ends up pulling apart his own life and security.
Again, perhaps a tragic hero is a combination of good intentions, fervent pursuit of a noble ideal, at huge personal cost.Is it simply that Oedipus possessed a degree of self autonomy that was incomprehensible to the common man and therefore the gods MUST be involved?According to Aristotle, the protagonist in a tragedy must have a tragic flaw that ultimately becomes the cause of his ruin.The prophet tells Oedipus that he will one day kill his father and marry his mother. In doing this he is going against the gods, he is saying that he is not going to let this happen to him and he is going to control his own destiny.The second example of when Oedipus is shown having a great deal of pride is when he goes against Creon. He says that Creon persuaded him to send for the prophet, Tiresias, to find out who murdered King Laius.For Oedipus, it might just be his virtue that brings him crashing down.Why is oedipus's life worse at the end of Oedipus at Colonus?He leaves his home to avoid the prophecy, only to fulfill it by killing his father and marrying his mother.He vows to find the killer of his father at all costs, even though he doesn't realize the murderer is himself.The last example of when Oedipus’ pride gets the better of him was when he is demanding that the messenger tell him all he knows about who his real parents are.Again the messenger is trying to tell him that things would be better left untold, but Oedipus has to keep going on and on and find out.