I would rather have a lot of things too. But neither you nor I have the right to decide who lives and who dies. We are not God. No human has the necessary wisdom and understanding. Maybe there is a technology right around the corner that will completely change the entire equation. Do you know the future? How would you feel if you supported draconian policies that caused immense human suffering, only to have to say "Oops, guess I was wrong".

So whether the world is overpopulated or not, I don't care. It is up to God and God alone (and maybe natural selection) to make that call. Nothing can ever justify a person taking that decision upon himself. Nothing. Our preferences and values are completely irrelevant here.