11 Biggest Sins Of Batman v Superman

How come not a single live-action Batman movie has paid the slightest bit of attention to his title as "The World's Greatest Detective"? It's happened continuously in every adaptation, but no film has portrayed him as unbelievably stupid as this one.

Bruce Wayne is so inept at his job in this movie, it makes you wonder if maybe in this continuity, the Joker bashed his head in with a crowbar instead of Jason Todd. 

There's this whole subplot involving the White Portuguese which Bruce seems to assume is a crime lord for no reason that's ever explained. Then later he discovers it's actually a ship. He never realizes for one second that all these messages he's been getting about how he let his family die are actually from Lex Luthor.

Why doesn't he do anything other than the very basic of investigation into these events? How come he never attempts to look deeper into what Lex Luthor is doing? He knows that Luthor's involved with some shady dealings, but just kind of shrugs all that off and single-mindedly focuses on getting the kryptonite (which, by the way, how does he know about?). 

Given all this information Batman has on Luthor, you think it'd at least make him a tad bit suspicious about what the guy's actually up to. But instead, he allows Luthor to play him like a fiddle throughout the whole movie.