What zombies are we talking about?
WWZ? You are fucking dead.
28 days later? You are fucking dead; the only way to survive is to last the first 24 to 48 hours.
Dawn of the Living Dead, Zack Edition? You are fucking dead.
Resident evil (the games)?Youu can survive by just hiding for enough times so that the zombies die out.
The walking dead? Everyone survives aside from the first unlucky bastards.
The point is, if the zombies turn fast and are runners, is fucking over, unless it is 28 days later and they just starve out after some time and even there, if you can survive the first hours.
There is no point in knowing any survival skills if you can't outlast the first hours or days. That is why it is super realistic that at the end of zombie movies, everyone dies.