Every German corporation that was around back then had ties to the Nazis, especially anything industrial. As one can see in the US at the moment, corporations swim with the tide.
Most of these companies succeeded despite the Nazis, not because of them, with obvious exception being VW.
TNG is the most uplifting, imho, but as the others have said, the first seasons are hit and miss.
If you can make through the fourth episode, which is widely considered one of, if not the worst, whitout wanting to quit right away, you'll bei good, it only get's better.
If not, skip ahead to season 3.
Also, everything looks more modern from seasons 3 onward, if the 80s look bothers you.
Clip for the uninitiated