I'm not a big movies fan myself and have seen very little of these big and popular masterpieces.
But when I do watch movies I'm that guy who points out the obvious plot hole problems in the middle of watching :D

When a narrator is used to explain plot holes it often times feels very lazy way of doing things, I prefer when flashback scenes or some direct contact scenes are rather used for explanations.

But then again, I'm not a big fan of movies and watch them very rarely.