Snyder falls short on character interaction Every. Single. Film.
This Justice League is so much better than the original, by a mile. But it's clear what Whedon was trying to accomplish with what he was given. Snyder doesn't know how to make characters properly interact. I don't give two cents about the characters that were written in this script. I love all of the heroes that are being portrayed, but there's little to no depth in the ones in this movie. Batman, Cyborg, Superman... All of these characters are just actors reading lines only to push a story plot along. There's very little reaction to the other character's lines, none of the conversations seem organic. Wonder Woman, Aquaman, and Flash don't suffer from this quite as much but they're still very poorly written into the script. Zack Snyder simply doesn't know how to direct characters. After seeing Ray Fisher's dialogue, it's no wonder he was cut out of the original as much as he was. Snyder did are terrible job having him in the movie. Great backstory and amazing CGI but his only lines are to say words to people, not react or show any assemblance of other people talking. Ben Affleck, same exact thing. It makes for very single dimensional characters that don't make you feel like they're someone you should care about. When you rely on fans of a series to prop up your characters at the expense of actually writing compelling figures to look up to, you'll always alienate non fans from a series. This is the major difference between the Nolan Batman trilogy and this current DC Universe. It's not Affleck's fault that Batman sucks, he's directed and scripted to be awful.
This was a huge issue for Man of Steel, Batman vs Superman, and now Justice League. We can joke about how dark the Snyder films are but that isn't the issue. Keep the fanboys happy by pumping out films and it'll sell, but this is honestly just another flop; especially to people who aren't already fans of the heroes.
Overall I wasn't impressed but I loved the action scenes and there are some amazing dramatic moments. I'm also glad Cyborg and Flash were expanded on. I just can't get over how poorly Snyder's characters interact.