3 over 5 factions have the upper hand and it appears they all use free-tech nades (OKW and OS) or Meta (SOV with Penal/Guards). So there is a correlation, now my question has you didn't want to see is if the causation exists.
Grenade isn't a limited faction that have Little to 0 correlation with victory or defeat unlike speaking english or not. Grenade can wipe squads and more generally wins engagement. So the question is how much do they impact the actual meta.
Some time ago when the game was balanced around early/late game assymetrical balance, grenade design was making sens in the way to delay teching and force choices for the early game dominante factions. Today I think the question need to be evaluated.
So far, except being a true sarcastic heroe you didn't prove anything.
Im confused what exactly your trying to prove with these stats. That OST, OKW, and SOV have the upper hand because of nades?
Ther are many things you also cant take into account, such as player choices as some players may purposely delay teching their nades (thus reducing the amount of nades they use per game).
IMO ther is VERY LITTLE to NO correlation between a faction performance and whether "free nades" has much of an impact compared to teching as your trying to prove.