The intro scenes are giving question marks all over.
Can't sense the shark's attack? Something huge, and definitely had the intent to aim & destroy.
Oda wasn't aware that he fails all three characters : FS user, a CoO specialist, a Fishman Helmsman.
Didnt save the girl in distress? When almost all arcs is him saving females left and right.
The first scene can be fixed with the SH doing a party, then the shark sneaks attack them. That's a good example of caught off guard without trashing the SH.
The second scene can be fixed with him prioritizing Nami's safety over the random girl in distress.