Oedipus' tragic flaw is his pride, or hubris. He is too confident in his own abilities and believes that he can escape the fate that has been foretold for him. This pride leads him to make several mistakes, including killing his own father and marrying his own mother. These mistakes eventually lead to his downfall, and he is forced to suffer the consequences of his actions.
Oedipus' tragic flaw is not only his own undoing, but it also has a devastating impact on his family and the people of Thebes. His crimes lead to a plague that devastates the city, and his family is destroyed. This shows that the actions of one individual can have far-reaching consequences, and that even the best of people can be capable of great evil.
Despite his tragic flaws, Oedipus is still a sympathetic character. He is a good man who is trying to do the right thing, but he is also a victim of fate. His story is a reminder that even the best of people can be flawed, and that even the smallest mistakes can have devastating consequences.