The Black, Red, Yellow has a pretty lame background. It supposedly represents the colours of the three centrist parties which created the German Republic under Ebert. The Weimar government was an anti communist state who lead to the creation of the nazis. So it’s right to be critical of that, but replacing it with the colours you have chosen basically looks like an actual Nazbol to anyone in the know. The background flag is flown by nazis in Germany today, because the swastika is forbidden they use that flag. I think a lot of people with German antifascist experience will recognise that. So I would say retire this one
‘Weimar Republic was progressive’ is a propaganda take by Germany to make them feel like the nazis happened in isolation. Your understanding of the Weimar Republic isn’t materialist. Rather than talk about quantum mechanics which had no impact on the workers, you could talk about how the SPD killed Karl and Rosa and wiping out communists to make sure that there was no chance of a workers state. And look what it led to… So anyway I would say I’m not being hard on the Weimar Republic