DC and Warner lacked unified leadership, a singular direction
The sooner they drop their EU for good, the better. They were always playing catch-up with Marvel, who had years to refine their formula and a well plotted long-term plan. DC were left churning out cobbled-together nonsense, with Wonder Woman being the only decent result imo. And even that was down to Gadot and Pine's chemistry as opposed to a decent script or direction.
As much as I make fun of the pew-pews, I like more Marvel films than I dislike, the Cap America films in particular. I have become jaded and uninterested in most of their product now for sure, as there is a
lot of them, but I'd love if DC just stuck to this route. There isn't really enough room in most people's lives for another shared universe, but films like Nolan's Batman and, from all reports, this new Joker film can provide a different experience, which only benefits the cinema-goer.