Good guy Goku!

Well that's because Man of Steel Supes is a moron. Normal Superman tries his hardest to not let people die in the comics, even whilst fighting villains like Doomsday or Brainiac.

That is only because Zack Snyder went to the Michael Bay film school of 'splosions and slo 'mo. Richard Donner Superman brought the fight with Zod to the Fortress of Solitude which is famous for being " Solitudy"

The death toll was confirmed to be massive in BVS

Good guy Goku