Mutated Evolution

The world has ended. Society has collapsed and now the world is full of danger. A deadly mutagen has infected the world and brought upon deadly and dangerous creatures. Zombies, mutants and disgusting creatures have appeared. MC is no pushover and hates gullible people who rush into danger with no plan. He detests the weak that don't have enough power to protect those they love. Why would they spend time cuddling when they should've been training to get stronger. MC doesn't do things for free and often has hidden agendas when doing things. NO HAREM, probably no romance as well (I'll see if I'm able to write a female character that I don't hate myself, if so expect romance I guess)