Well one he did in defense of the human race. As Zod was an unrepentant killer of humans and threatened to kill more humans.
The other was a situation created by Superman's own action of leaving earth for 5 years and not even saying goodbye to the so called love of his life. The world didn't stop Supes. It moved on without you as did Lois. Get over it.
Honestly the whole Superson thing is a gimmick you could see being introduced as the last part of a trilogy. Not the beginning of a soft reboot like SR. Seeing where they were going to take it in the sequel to SR that never happened. Makes the idea even more shallow and stupid.