Too goofy for my liking.
The humor was very silly at times and outright cartoony looking (I understand all the CGI complaints). I'd have prefered a more serious attempt at the story.
It: Chapter Two (2019) had a similar problem, it was also tonally retarded with a few goofy CGI scenes. I think I'd like Andy Muschietti replaced as the director of the upcoming Batman film. I don't have much faith in him.
Michael Keaton and Sasha Calle were the best parts of the film by far. Barry Allens back story was good too. The flashpoint story arch was okay.
Ezra Miller acted well for what he was asked, however his characterizations were very goofy and part of the tonal problem.
All the cameos are quite useless unfortunately. Gal Gadot has like 10 seconds of screen time. Boo! Nicolas Cage has like 5 seconds and doesn't even say anything. All these little blink and you'll miss it cameos are worthless. Would be better to have Cage or Gadot actually having a big part to play and the other cameos all scrapped.
An alright film that didn't deserve to bomb that hard but still disappointing and flawed. A weak 7/10.