In what way is Oedipus a better man (though less fortunate) at the end of Oedipus Rex?

There is no one right way to answer this question, but it is possible to say a few things. First, he is a better man, because of all his sufferings and hardship. Usually a person who goes through a lot learns much. The school of suffering educates well. In Oedipus' case, he probably would not gotten to where he is at the end of play apart from suffering. Second, we can say that Oedipus by the end of the play really knows what he has done and who he is. The self-knowledge is a true sign of maturity. Before this he was living a life that was filled with lies or half-truths. From a literary perspective, even though he is now blind, he truly sees.