so the Greek bigfoot is called Oedipus. Oedipus was twice rejected by his community. First as a new born child, he was "exposed", that is to say he was left alone in the wild and abandoned to his fate. His ankles were tied and his foot swelled up, thus the name Oedipus (Οἰδίπους) - Bigfoot. Then, as an adult (he had been found and saved by a shepherd), he was expelled a second time, accused of having spread an epidemic of plague, and took refuge in a forest... Swollen foot, cripple, malformed, hunchback, cross-eyed, stutterer, they are all the same : all eternal candidates to banishment.
Oedipus and Bigfoot share the same story, whatever the continent and the culture: they are people who were banned from their communities and left to die in the wild, alone, by their own... There are many variants of this not bloody rite or sentence: babies abandoned in a coffin on a river or sailors in a dinghy on the ocean, inuits forced to flee naked on the pack, victims forced to jump a cliff... they just vanish... And they are presumed to be dead. From time to time, against all odds, a lucky one survive for a while, reduced to a non-human condition... Their former communities do not recognize them as persons anymore : their names have been forbidden to pronounce, they are like ghosts, nobody, vanished.
Oedipus and Bigfoot are evil, they were expelled because of their evil and supernatural influence, but once reduced to starving sub-humans, to less than beggars, they are even unable to cause any physical harm. So, the Urals may have hosted some Oedipus or Bigfoot, some outcast, some eternal victim of the superstition of his people... and even in the 1950's, but no miserable and starved walking human shadow could ever have killed Dyatlov and his friends.