Agreed with Dragon on the mark: 6/10.
I expected to be dissapointed, but had a bit of enjoyment out of the movie. But the more i think about the movie, the less i think of it.
Right off the bat, another origin story. Because that was necessary in a BvS movie, that has a story about Batman, Superman, Lex Luthor, Wonder Woman, cameos from other Justice league members, Doomsday, Darkseid introduction, love story, (some) time travelling induced nightmares, and multiple others. I found this to be one of my biggest problems with the movie, because it oh so perfectly displays someones inability to make priorities. It is the "can't see the forest for the trees" thing.
Ultimately, studios / directors /screenwriters choice of making cuts at random places ruin a movie and leave a more-than-casual fan (myself) scratching his head. It's the Thor scene from Age of Ultron over again. Half of the movie i'm thinking "Wait, where did this come from?". The imaginary dad conversation was the icing on the cake. Cut out 18 months but leave imaginary dad in. I presume it was made due to the necessity of giving Superman some depth (not the way to do it, IMO). Or Kevin Costner being promised to appear in several movies.
As others, i think certain problems with pacing could've been avoided if so many stuff was not shoehorned in the movie. Then you could've avoided giving a deleted scene on youtube (a mere week after the premiere) to explain what should've been explained in the actual movie (Lex and Darkseid thing and Lex going mad). Certain stuff not being explained and then having the characters do a forced exposition was apparent (such as army men explaining that Doomsday adapts and absorbs energy seconds after he survived the nuke).
I have to admit i did not realize this directors grand plan of presenting knightmares (holy crap Batman, this is so pretentious, do we have to have a ridiculous batman name for every single word in english language) as a way of explaining this separate timeline (Batman was supposedly in) collapsing in on him. I consider myself a bit more knowledgeable on the topic than the regular guy, but not a DC wikipedia type of guy. And i was completely dumbfounded by this.
I think i noticed a single joke in the movie. One. At least have Superman/WW pretend to be hurt after Batman punches them. Come to think of it, Batmobile being thrown off by light Superman tap with (his legs, if i recall) was the funnies part of the movie.
The fight was good. More than i imagined. As Dragon says, if you shut down a part of your brain and pretend it wouldn't be over just as the gif below (from Man of Steel) shows.
What i found very interesting is that i don't seem to remember some epic memorable or quotable moments. Would it kill them to put a scene like this?
I'm kind of torn on what i think about Lex. I hate the casting choice. Cranston would be ideal for my vision of Lex. But i get that they would go for Eisenberg for their vision of Lex (which i also hate).
Overall, i'm glad i saw it for the story. If i watch it again, i'll watch only the fight scenes.
Random thoughts:
The dark knight returns nods were good. Especially when Batman is fleeing from Doomsday.
Doomsday coming felt like Uruk Hai being "born". Until he becomes UberDoomsday.
Lex has a file on every superhero (I still don't understand how), and then resorts to kidnapping and threatening to kill an old woman.
People realizing it was the wheelchair guy with the bomb, and not Superman (which was my initial impression people would think, because, hey, Superman is brought in for questioning, he flips and kills everyone)? Could've fooled me.
What the hell was the deal with the skinny asian chick was with Luthor? The movie led me to believe she was of some importance, but then she just dies on the Capitol and is like "screw you Lex".
I think they went too far. And not because i didn't get it. It's because it seems (after connecting all the dots and seeing all the easter eggs and watching the deleted scene and whatnot) they tried to connect the things they are to show in Justice League 2 with this movie. Flash is not yet introduced, and you're already presenting alternate timelines? That's getting ahead of yourself. It's this artistic thing where they fail to do something and do a copout saying "you just don't get it". IMO, they failed. Show it in the movie. Don't make me watch the deleted scene right after watching the movie. I can understand them not wanting to take it easy (as Marvel did). But this felt forced.