The thing is that Geoff Johns had some influence. Snyder was a director first, a consultant second. Snyder mostly to other people. In BvS the ones righting the ship were Ben Affleck, Chris Terio, and Geoff Johns. The JL bits in the movie are all Johns.
Johns worked in: Batman v Superman, Wonder Woman, Justice League, Aquaman, Shazam, Wonder Woman 84, and is currently working on Green Lantern Corps. BvS was disappointing, and while WW was a success, JL was a fucking disaster. So he got some of the blame for it.
Even it all that said, Johns is right now focusing on the screen-writing side and his own movie studios he launched. He's not so preoccupied with the comics side.