Marvel have a higher over all quality of Superhero, and the movies have been pretty much on the money apart from the odd hiccup.
DC actually have my all time favourite character, Swamp Thing, I grew up on 2000AD, and the darker, edgier stuff that came from Alan Moore fitted nicely with Swamp Thing, what he did with The Saga of The Swamp Thing reinvented comic books for an adult audience.
The Batman films were great, even Man of Steel had its moments, but no overall coherent strategy that would or could compete with Marvel, has left it playing catch up, and floundering in Marvel’s wake. I mean FFS, they took a second tier character like Iron Man and shook the movie industry up good, they went one better with some Z-List superheroes in GoTG and shook up the superhero movie world again!
DC should not try to copy Marvel, they need to offer us something new, what that new is? Who knows!!!