Curate, connect, and discover
Wait I thought it was his overly investigative nature. Which Tiresias implicitly warns him against. Like don't be soooo intent on digging out the truth..you might just be digging your own grave all this time, instead.
The term "hubris" is overused, probably because it's a fancy word and sounds super official in a conversation. It comes up every time people discuss fatal flaws--and it IS a frequent fatal flaw in literature, but it shouldn't be the default answer.
When my class studied Oedipus, a lot of people said pride was his fatal flaw, which... no. If you read the play, his most prominent flaw is his short temper. He's so quick to anger and become violent, which is probably what led to him killing his dad in the first place. His fatal flaw isn't hubris, it's poor anger management.