"Oh I'll let loose, I have such fury in me—" (393-394)
"You pray to the gods? Let me grant your prayers" (245)
Oedipus' fatal flaw is his insane amount of pride. He does not and will never believe that he could possibly have anything to do with Laius' murder because he is too awesome to be a criminal.
Anagnorisis and Peripeteia
"I stand revealed at last— cursed in my birth, cursed in marriage, cursed in the lives I cut down with these hands!" (1307-1310)
Oedipus literally thinks of himself as a god that can grant wishes at will. He is overflowing with hubris and pride and it is so obvious. He has an incredible amount of pride and arrogance and that trait leads to his downfall.
"Here I am myself— you all know me, the world knows my fame: I am Oedipus" (2-3)
This is the anagnorisis for Oedipus. He realized that he had been stripped of everything he once thought he had and is now left with nothing as a result of trying to reverse the prophecy. This is also his peripeteia as he is now left with nothing. No lover, no parents, no power.
The main villain and Oedipus' nemesis of the entire story is himself. His flaws of character are his downfall and there is nothing worse about him, than his excessive pride. Oedipus acts like he is Zeus and that his is the most powerful being in the universe even though it is actually Zeus.