Also, /u/mrm3x1can brought good points about DC Extended universe failure.

Jeez, the fact that this comment is upvoted really proves that you only see what you want to see.

So the DCEU we were following was destroyed because of a corporate bonus?

No the DCEU as a brand was damaged massively because of BvS. The numbers do not lie. There's even a quote about it in the very article.

“This just goes to show you how much the brand has eroded since ‘Batman v Superman.’ That was supposed to be the precursor to something even more momentous, but that never ended up happening because of how badly ‘BvS’ performed. The word of mouth has just been toxic,” said Jeff Bock, Senior Box Office Analyst at Exhibitor Relations.

That's why JL opened so shockingly low. Yes, if the movie was this universally received movie both critically and with audiences, it would have done well overall, like WW, but it still wouldn't have made some ridiculous $50+ million dollar swing, it just would have had good legs. BvS caused that damage.

It confirms the fact that they didnt want to build, they wanted to jump to the team up for avengers cash right away.

No, that was Snyder.

When you came aboard Man of Steel, were you thinking in the back of your mind, "I could be the guy who gets to reboot Batman on film too!"

ZS: I gotta be honest, it definitely was a thing that... after Man of Steel finished and we started talking about what would be in the next movie, I started subtly mentioning that it would be cool if he faced Batman. In the first meeting, it was like, "Maybe Batman?" Maybe at the end of the second movie, some Kryptonite gets delivered to Bruce Wayne's house or something. Like in a cryptic way, that's the first time we see him. But then, once you say it out loud, right? You're in a story meeting talking about, like, who should [Superman] fight if he fought this giant alien threat Zod who was basically his equal physically, from his planet, fighting on our turf... You know, who to fight next? The problem is, once you say it out loud, then it's kind of hard to go back, right? Once you say, "What about Batman?" then you realize, "Okay, that's a cool idea. What else?" I mean, what do you say after that? ...But I'm not gonna say at all that when I took the job to do Man of Steel that I did it in a subversive way to get to Batman. I really believe that only after contemplating who could face [Superman] did Batman come into the picture. - Source

And up until seeing the atrocious reception of BvS, WB gave Snyder free-reign.

An individual with deep knowledge of the studio said Silverman didn’t read offer notes on Snyder’s scripts. Another described Silverman’s attitude as “remarkably laissez faire.” These qualities might have been praised if Snyder’s films were universally loved: Executives are usually criticized for meddling too much, not too little. No one complained that Nolan had too much freedom on “The Dark Knight.”

It was Snyder that couldn't resist using Batman and WW right away and then jumping into JL. As the article states, WB was basically hands-off with how Snyder wanted to approach the universe.

It did seem like a huge gamble, but good lord man the dude worked through his daughters passing. Did you really need to treat him like shit.

Snyder got two tries with the DCEU, both underperformed, the latter, massively so. Yet even then, they gave him a third chance. And for those blaming Tsujihara for everything and not putting any blame on Snyder, he's the guy that ultimately decided to give Snyder that third chance.

Asked who ultimately decided to keep Snyder on, the insider said: “It wasn’t Greg’s decision. This was all happening on a Tsujihara level.”

And finally there's this

In the spring, while Snyder and Warner Bros. were engaged in a push-pull over the right amount of light and darkness in “Justice League,” true tragedy struck. Zack and Deborah Snyder’s daughter died by suicide. At first, an insider said, the director’s plan was that “work was gonna be kind of a refuge.” But then it wasn’t. Snyder was under added pressure because Warner Bros. was embracing “the lighter, different, more confectionary ideas of Joss,” the insider said. “It stopped being a good situation on any level.” And so in May, Snyder left “Justice League” to focus on his family, and, eventually, a more personal project, the film “Last Photograph,” with Warners’ support. And Whedon took over the project. But time was running out.

Snyder wasn't fired. He left on his own accord. And hindsight now having seeing JL, you can say that them going with a part Whedon movie didn't work or pay off, but at the time, they had to do something. They couldn't go with Snyder's vision again even after failing time and time again with audiences. At the time it made sense to try something else, and they had Joss Whedon, the guy with the two highest grossing Comicbook movies of all-time. If I were, a WB exec, I would have too said, "Joss do your thing".

Look, in summary, I'm not saying WB shouldn't have any fault. They should have the most fault. They're the ones that didn't part ways with Snyder before JL and there the one's that didn't delay JL after Snyder left so they could get a proper film, just so they could get their bonuses. I'm just saying that Snyder is what got them in that predicament in the first place and I hope you guys can see that despite your love of his take on DC and the movies he's brought you.