Zack Snyder really seems like he's trying to gritty this thing into the ground

[mythology]

9. It's not like he did a great job with the Superman character

so why not feature him less?

Superman doesn't kill and he breaks Zod's neck, Superman is super vigilant about not causing property damage and yet Metropolis and Smallville were left in rubble, Superman could have saved his dad and not exposed his powers but instead he twiddled his thumbs.

The problem is that DC (in the modern era) has only been able to make the Nolan movies really profitable and well-received, while Marvel has had movies both under the Disney banner as well as properties like X-Men and some of the Spiderman movies find commercial and critical success. So DC is going with what worked for them and trying to make Superman gritty. Which doesn't work because he's a big blue boy scout. His world isn't supposed to be Batman's world.