Funny that this is one of the complaints I hear about the DC movies prior to BvS.
I actually didn't mind that part?
It's the bad story, bad dialogue and not so good FX that were the dealbeakers for me.
And yes Superman's "death" in BvS was so laughably unearned. After watching the movie, I'm sure approximately no one thought the character was actually dead.
I never really hear this as an argument, but IMO the reason the DCU isn't working is that they are trying to mimic the MCU, but at 10x Speed. I mean they were trying to go from Iron Man to Avengers in 3 movies instead of 6--I *guess* 4 if you count Suicide Squad, which I don't as it didn't set up anything for Justice League.