The previous Pages' comments on Mac's focus on humanity makes me wonder how I see things differently. Not that I don't agree that he focused a lot on humanity, but I don't think the situation was good in this regards in ME. And I'm not referring to the last part of the game, With the Alliance that saved the day and all the various Council endings.
Humanity might be the underdog At the start of the game, but think about their status. Politically, They reached a position in Citadel space that it generally takes far, far longer to achieve. The Council considered twice the possibility of a human Spectre, when only the three leasing species had those. Humanity managed to fight the Turians, the strongest military in the galaxy, in the First Contact War, and rapidly create strong fleets and army, becoming one of the strongest species in the galaxy. They co-developed with the Turians an advanced ship with features nobody have, and said ship is part of the Alliance fleet. All of this in a short periord of time, expecially compared to the other species.
So while Mac definitely the attention on humanity, it's not like ME did a good job, in my opinion, as humans were already in a kind of special situation.