>>716039356We kicked the Turians asses during the first contact war when we knew what we were up against before the council stepped in and stopped the war.
Humanity just because it's new to the Galaxy isn't some pussyfooted species that suck council dick 24/7 for protection (like the Elcor or Volus) we have a sizeable population and fleet and can wave our military cocks around plenty to get what we want AND have been shown willing to colonise in dangerous far border regions of the galaxy.
Also due to the councils rules/bans on powering up newly discovered Mas Effect relays just because we "own" a large chunk of the galaxy on a map doesn't mean we've "unlocked" all the planets and lands there as fully ours
It's likely humanities control of key relay hubs basically boosted our 2D borders but not a lot of actually impressive planets in those sectors that are worth a shit for mass colonization
Humans basically try to be a jack of all trades civ while the council races min max a few tech/culture trees and as a result are heavily reliant on humanity to pick up the slack when they faulter in their specalised areas.
TL:DR Humanity rules and Aliens are faggots