Honestly speaking, this is moreso a showcase of the bad CGI itself than a movie spoiler. It's not just usual bad CGI, it's almost makes scenes ugly to watch. Mind you, the director's excuse for this is that's it's actually supposed to be bad on purpose, to show Flash's PoV.
We have a scene where the film (kinda) tries to rip-off Quicksilver scenes from the Fox X-MEN films. I say kinda cause any Speedster film can do it, it doesn't automatically mean it's a rip-off. One more thing, he puts a baby in a microwave.
That baby in microwave thing? He does it twice.
The film tries to sell Ezra as a thirst trap, but he's no Cavill, he's not even Batffleck, or even Jason Momoa as CHADquaman. Seriously, he has so many ass-shots that you'd think the director wants to breed Ezra's Ezrussy. Mind you, this is a film technically made for kids.
One thing I saw which made me laugh was Keaton's hair & beard, which looks like it's taken from some Halloween outfit. Seriously, it's like they spent most of the production budget of this film into getting Ezra out of jail.
Later, we get an unironic mobile game ad in the name of a ENTER moment. No seriously, it looks like a Fortnite screen.
Honestly speaking, Supergirl's role in this is very weird. She might unironically be the least bad character in this, while her role is almost consisting of 10 lines & a total screentime of 15 minutes at best. Yet despite that, her character feels like it could have some depth. Also, I don't know how I can remotely like this film after it desexualizing a somewhat hot Latina.

SEXO
Her actress, Sasha Calle, is a Telenovela, soap-opera actress so her acting is pretty mixed, she just screams most of the time, & her whole job in the film is essentially being Zod's punching bag & later dying by his hands in just 15 minutes of her total appearance, which is very based in my book. At the same time, if done competently, she might not be as bad. She does make for a good meme potential tho.
Speaking of which, Michael Shannon tries to do his best as Zod here, but you can tell he has to actually try hard compared to his peak in Man of Steel, as if he wasn't lying about the "hard to act in front of just green screen" part in his recent interview. To make it even worse, DCEU's best girl, Faora-Ul is back... for almost 5-10 seconds, with mask covering her face so much, they might as well could've just used a lookalike (yes, Antje Traue actually came back as Faora-Ul for this).
Funnily enough, the best cameo in this film, is also Superman's... Nick Cage's Superman.
Batman's suit is probably the worst in live-action history. Also, this is probably the 1st Batman on screen who stands with his hands clasped like a vulnerable betamale. It's BetaBat, or BatBeta, which sounds more awkward. It's like the Tom King Batman run suddenly got adapted cause he's working on his own DCEU project.
Oh yeah, speaking of Batman. George Clooney is apparently the next Batman to cameo, but the one in the post-credit scene is rumored not to be George Clooney himself, but George Clooney, deepfaked on Keaton.
After all this, we get this... I swear to god, I think I see Elliot Rodgers in this.