"I just was kind of done with it. I was in this place of [knowing] my family needs me more than this bullshit, and I just need to honor them and do the best I can to heal that world. I had no energy to fight [the studio], and fight for [the movie]. Literally, zero energy for that. I really think that’s the main thing. I think there’s a different world where I stayed and kind of tried. And I’m sure I could have . . . because every movie is a fight, right? I was used to that. But I just did not have the [energy]. There was no fight in me. I had been beaten by what was going on in my life and I just didn’t want to, I didn’t care to . . . that was kind of where I was."
Zack Snyder's Reason Behind Leaving Theatrical Justice League
ZackSnyder during an interview, reveals the reason for quitting Justice League theatrical version during set.