Justice League ... didn't totally suck. It was
way better than anything else in the DC movie universe -- except, of course, for
Wonder Woman. But that's faint praise indeed. If it had been a Marvel movie, it would have been a major disappointment, but it was nice to to see a DC movie that
sort of gets the characters and what drives them. [Again,
Wonder Woman being the noteworthy exception.]
Overall, it wasn't bad, but the movie felt rushed, and too many plot points were poorly explained or not explained at all. Similarly, most of the characters (with the notable exception of Diana, and to a lesser extent Batman) seem poorly-developed to the point of being one-dimensional.
Maybe it will finally get through the heads of the people in charge of the DC movie universe that the
less Zack Snyder has to do with the movie, the better it is.
I appreciated the Deathstroke cameo, but I still say that casting Jesse Eisenberg as Lex Freakin' Luthor was just ridiculously poor judgement.