Teiresias tells creon that the only crime is pride. how was creon shown that he is guilty of pride?

Creon will not listen to anybody - he thinks that he is the smartest one and that his decisions are the only ones that are worth something. He will never admit that he is wrong, until the end of the play when his whole family dies. He is guilty of hubris, which is excessive pride, which is the cause of his downfall.