In Antigone, is there information that suggests Creon brought problems amongst Thebes because of his pride?
I think that there is enough information in the drama to suggest that Creon's sense of pride brings problems to the people of Thebes. Consider the reaction that Creon has to Teiresias as evidence of this. When Teiresias arrives to tell Creon that he has to reverse his edict, the blind prophet cites some significant reasons for his vision. The "state is sick" and the altars being "polluted" are reasons that exist larger than Creon. They are selfless reasons, representing civic virtue and religious purity. Yet, Creon rejects both of these reasons. Creon is shown to value his own pride and his own word, his own sense of self, as more than these selfless elements. In the process, Creon insults Teiresias calling him a "prophetic profiteer." Both the embrace of Creon's own edict and his rejection of Teiresias represent how Creon brings more problems to Thebes because of his pride.
Similar elements of pride can be seen when Haemon begs his father to relent. Creon does not validate his son's voice. He does not listen to the wisdom in his child. Rather, he insults him. Creon rebukes his son and, essentially, calls him a woman, representing an insult of the lowest kind. For Creon, the manner in which he rejects his son is done out of pride. Creon has opportunities where he could acquiesce from the position that his pride has caused him to stake. He does not take these opportunities. It ends up costing him in the worst of ways as a result.