Curate, connect, and discover
Well you might be onto something here yk. Given that patricide and regicide were the most serious of crimes in classical greeece, since they destabilized the 'polis' and it's primary unit- the family usually headed by the patriarch, Oedipus' anger and consequent killing of laius did make him a rule breaker by overstepping the divine law which stated the same rules. Plus he unknowingly usurped laius' royal seat and married his wife, which could be a twisted interpretation/manifestation of ambition. But anger at being contradicted, powered by pride, seems more contributive a flaw later on, than one directly precipitating his downfall. It directly sets the prophesised events in motion only once- with the killing of laius. Later it acts more as an accompanying flaw that prohibits him from evading downfall. It was weird that it antagonized the receiving party and yet didn't directly reap disastrous results. Tiresias, the shepherd and even Creon don't exactly harm Oedipus, but yes these instances don't bar the investigation which needs to be barred, for Oedipus's sake ig. It blinds him to the warnings against his core flaw- his investigative nature powered by pride. Eventually it was the inability to stop, his determination, ambition to see to the end of things, to find out what he has willed to is how I believe he oversteps,again( although NGL this makes less sense). This investigative nature to stop the plague, which is a divine curse. Even Jocasta's vehement plea prior her suicide won't bend him.
I like to think that both play a part. He refuses to be contradicted and refuses to stop. Both manifestations of pride, albeit of different kinds. It just felt like his investigative nature comes closer to being a product of the ambitious pride than anger.
Also I apologize for my ramble.
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.