User blog comment:Kogath/Monster Hunter: World Discussion/@comment-37617547-20190912075450/@comment-5158920-20190912130038

It does however Nerg still takes damage. If it was an outright win they would have programmed it so Nerg never takes damage. It was deliberate.

And while this doesn't have anything to do with lore but normal Nerg has the second lowest health out of any Elder with Kirin being the lowest. If let's say Teo and Nerg were to spam turf wars then Nerg would die first. There's even a video on youtube showing both of them wailing on each other in a arena with the player not attacking and Nerg loses in the end.

Predators don't win all the time anyway and Nerg as a species has to fail constantly otherwise if it really was too good there would be no other Elder's left.

Also what's also puzzling is Nerg not being in the Old World even though it can apparently live fine there. Just speculation but there's a chance that the Black Dragons are just too much for Nerg and all the ones in the Old World got wiped out long ago. Or the Elders of the Old World are just stronger than the New World ones.