Why is the F-22 not a stealth plane and nowhere near as invincible as in real life? Because the in-game unit could easily be a modified production model that got rid of many expensive features in order to make it economically viable in the first place and changed from an air superiority fighter to a multi-role jet, explaining both the absence of the F-35 and the fact that Raptors are shown to be carrier-capable in several Zero Hour cutscenes.
The European Union prior to the GLA attacks was very much on the verge of imploding on itself even as its leaders tried remolding it into an United Europe. Even had the aforementioned terrorist fiasco never taken place, it wouldn't take much to take down the EU altogether. If anything, the attacks both accelerated the process and provided the necessary justification for the mass Velvet Revolution that would result in the ECA.
While it makes sense that the GLA may lack female members (aside from the Angry Mob if you look closely), one may be just as curious as to why the ECA seems to have more female voices and units compared to everyone else. This could be chalked up to a number of European countries having significant gender equality in real life.