Frank Miller also came up with the idea that Batman and Superman would not be friends. People are not joking when they say everything in modern batman is based off The Dark Knight Returns.
This not entirely true.
They are still good friends in the comics. But much like Aquaman being a joke in the public, the public face constantly shown for anyone that doesn't read comics, is that animosity. public perception vs reality.
It should be noted that most even misread The Dark Knight. Again, Superman doesn't "lose", he just stands there and lets Batman beat himself to death on supermans face. And everyone seems to forget he knows Bruce is alive, and being Superman just smiles at it. Even after attacking him, still his friend.
Much of Batman really is though. and sadly the WORST parts.
The insane paranoid loner.
Morrison's work was a massive redemption. Heavy emphasis on the Batfamily. Dick taking over the mantle of Batman. Batman growing up as a person, and father.
The death of Damien, and Talia.
Sadly status quo of Dark Knight fanwanks, have pushed him back again.
It should be noted, that really the Dark Knight Batman, can not work as a member of the Justice League. Nor again, the Batfamily. Barbara, Dick, Jason, Tim, Cass, Steph. Father and insane sociopath don't mix.