I don't know how the music scene is over there in Europe but in Australia "Electro" is completely different to what your saying and Dark is no way near what you meaning either.
According to you, what should "Dark Electro sound" like ? Could you give us some examples?
BTW Schwarzes Fragment reminds me a lot of Project Pitchfork. If this was the goal, I think it's reached
Yes, the chord progressions are cheesy, and so are the synthlines, I'm not a big fan, but this is how the style should sound anyway. And yes, it sounds "old", but what's the deal?
Style consideration put appart, if you're accepting some constructive criticism, I have some remarks:
I think the voice line is a little too monotone. It's too often stuck on the first degree of the scale, or following the fundamental of the chord (e.g Flammenherz). What about add a some melody to this?
And an extra midground synth line doing something more "melodic" (something more complicated than repeated octaves, like an arp) could also greatly improve the thing. Listen for example to "Project Pitchfork - I Leave Your Dream", the piano melody during the chorus is an example of what I mean. "The Lack of Yourself" clearly goes into this direction btw
Another last thing, as an overall impression, the songs lack "interesting events". I think this due to the chord progression staying the same for too long, combined with the fact that all the foreground layers follow the fundamental of the current chord (It sounds like every measure is a transposed version of the previous).
Anyway, good luck with your "dark electro" project