It had the potential of being the best comic book movie but it was ruined by bad cgi (the fact that the director came out and said that it was intentional, doesn't make sense to me), and pointless cameos (spoiler alert)
Wonder woman, aqua man, etc.
Except for Micheal Keaton who carried the movie and I loved his performance
And then we have the story is that it doesn't follow it's source material such as villain and many plot holes and remembering the test screening that they gave positive reviews to it but I don't see that after all,
So after all it was a great let down