No one could make a decent 2 hours studio mandated JL movie.
I'm no fan of Weldon. He looks like a creep, and after learning of all the sexual harassment he has done, it confirms my belief that he's a douche. That being said, to be fair, no one could have submitted a decent 2 hour studio mandated JL movie.
Who is at fault here? It's the studio execs. It's clear this movie needed more than 2 hours to flesh everything out. We have six main heros, two of whom haven't even had their own solo movie to explore their backstories. We have 1-2 villains, and a bucketload of secondary characters. A two hour movie isn't the right format for the story.
DC isn't Marvel. Like what Snyder said, Marvel does action comedy, and what he was trying to do, and no one would listen was, he was doing mythical emotional journey storytelling. The studios wanted a Marvel packaged two hour movie, and got the Josh in to do it. Yeah, I know Snyder said he left of his own volition, but that's because he couldn't bother fighting them following his family tragedy.
He is vindicated.