I would just slap you real hard for asking me to shoot you, and offer you a bottle of wild turkey to suck on.
It's OK for you. You say you hate this planet, and the people on it. You want to move to Mars FFS
. Maybe you could cope with being a survivor of an apocalypse.
I love my life the way it is, and I love the people around me. If I were to lose that there'd be no point of me being alive.
If we were alone in the wilderness, and the scenario you've described were to happen. You would have to be brave enough to do the decent thing, and put me out of my misery in the quickest, and most painless way. You could then do whatever you want with me. Use me as food, use me as a decoy, inflate me and use me as a makeshift raft etc.