First of all, you're telling me aesceleus euripedes et al were talking about "winners" and "losers" as the fundamental dynamic of literature?

No, I'm saying that when we as modern readers discuss dramaturgical theory, we recognize that a key element of the path to a resolution of a narrative necessitates conflict in the vast majority of narrative theory. Can you name a narrative without conflict?

now that im older, ive since realized that the legacy of the ancient Greeks through the Renaissance to the modern West is simply not innate to humans, it's just the way one specific culture evolved.

Which cultures are you referring to that doesn't have stories that follow a narrative path, or have narrative paths without tension and resolution?

I'm afraid I can't see why Achilles being a bad person disproves that narratives have a structure and across cultural and language barriers those structures hold for at least a few thousand years.