Since Disney had created a successful Marvels universe, every other production house trying to do the same. And that's began with DCEU(DC Extended Universe). Now lets begin with a plot.
So, Dawn of Justice starts from the Man of Steel clips where Superan is killing General Zod to save the universe. But while saving the universe he destroyed a large portion of the city. As a result people have a polarized opinion on Superman's existence in the earth. And in the list of his haters one name is Bruce Wayne aka Batman. Now the whole movie revolves around the fight between this two superheroes and Lex Luthor's plan in killing Superman, his archenemy.
The plot is very much similar to Marvel's Civil War. But what makes Civil War superior is the character arc, which clearly shows the motive behind the fight between Captain America and Iron Man. But here director Zack Snider didn't gave the proper reason behind these two superheroes rage against each other. Mostly of batman.
The main reason could be the overburden of introducing the expanded universe. Means in a single movie audience had seen Flash, Aquaman, Wonder Woman and Cyborg and except for Wonder Woman it would be difficult for normal audience to recognize these superheroes.
Now talking about the performance. So Jesse Eisenberg sucks in the role of Lex Luthor. Luthor is a calculative villain whose dark side is well hidden behind his businessman persona. but here Jesse gave us a feeling that we are watching Joker without his makeup and suit. Rest all actors did their parts well. But what surprise us all is the performance of Ben Affleck who shines in the role of Dark Knight. And after see the badass performance of Gal Gadot in wonder woman role, we can't wait to see her solo film.
Music and cinematography was awesome. Just the story didn't gone well with the expectations.