All that being said I never made it more than halfway through the first one and it's unlikely I'll watch anymore. However, I have watched a lot of Snyder's films, all the Snyder-verse stuff, The Watchmen (I own the complete extended version but I hold Watchmen to a different standard since it at least tries to literally recreate the graphic novel which is rare for adaptations), and Sucker Punch.
I read somewhere where it was suggested the biggest problem is that he shouldn't be given complete control and free reign and I agree. Editing things down a bit would help a lot. I don't have a problem with his ideas but do get numb from so many being overextended. I also think that rather than making these as movies they might have done better in a 30-40 minute episodic format. I also agree that he uses slow-motion scenes way too much, kind of like Abrahms with lens flares. On the flipside, a fan edit bringing these both down to a 2 hour-ish movie might be interesting as well but it would really need to chop a lot of those slow-mo shots out.