Sending Doomsday into a star to kill him or what exactly?
Sending villains to the Zone is a good cop out I guess, tho I'm sure some people would rather die than being there. If you were put in isolation for the rest of your life, would you choose it? It's like being dead alive, especially if you can never go outside. I'd rather die.
In the new Death of Superman movie, Diana told Clark to not hold back against Doomsday or he would kill them all. And Clark fought the monster and did what needed to be done. I don't know about you, but I still love him and admire him because he showed in many other ways he was still a nice and kind person to everyone. Killing or not killing, he's still Superman to me. It just depends on the execution. Did you like it when Superman broke a powerless Zod's hand in Superman 2? I think many enjoy that scene.. I can see why. It is cathartic. But I also find it cruel of Clark to abuse his power this way. He humiliated Zod after Zod humiliated him. That was revenge. After all, Clark is still human in his heart. Same with the beatdown of Rocky at the diner.