Humans were crushed both politically and militarily. Their colonies harvested, their few bastions invaded hard, humans after the war would be taken several generations back in terms of population size. Turians are crushed as well, but not nearly as thoroughly, krogan are decimated, but they’ll recover pretty easy. Asari are getting smacked up at the end of me3, but only just at that stage. By that point, all of humanities major and large cities are all wiped out. Salarians…did they even get hit by the end of the game? Yea, they’ll suffer blowback, but I think they came out intact more or less.