I can forgive expobabble right at the start of the very first episode if it lets you get on with things as soon as possible, so it didn't bother me all that much here. Instead what I disliked was just how obviously grimdark the whole thing was, from the designs of the aliens to scene upon scene of people getting eating or ripped apart. It wasn't even well animated gore, just looked very silly.
Then the Schwarzesmarken come in and fuck shit up. For an elite squad, they're pretty stupid, one of the girls spends all her ammo shooting at corpses while going mad, while another guy goes around not following orders because he's 2good4them. Inghild gets her mecha ripped in half, which results in her being badly injured, instead of taking her back to base and healing her, they just shoot her "to end her suffering", maybe she was beyond help, but the dark screen at that time didn't really show you much apart from some blood on her face.
Then they go on a quick rescue mission, and Theodore rescues this girl who looks just like his sister who was shot escaping from East Germany, no doubt there'll be some weird as fuck romantic subplot going on between the 2 of them because VN adaption.
The episode was pretty shoddy in terms of animation, the mechs didn't look too bad as CGI, I've definitely seen worse, but the aliens just looked shit, though i think that is more down to design than anything else.