All, especially Atheists & believers of evolution. Is survival of the fittest the real deal?

"Survival of the fittest" doesn't mean survival of the cruelest and nastiest, like how you theists operate. It means whatever is best at reproducing itself will endure, and what is not so good at reproducing itself will die off. Our society takes care of its old and its sick because societies that do so last longer and are happier than those that don't. Societies that kill off their old and sick die off, and people move away from them because they suck to live in. You'd find that out extremely quickly if you actually created the world you think you want.