Let me give several alternate reasons: 1. There are far fewer Germans. 2. The percentage of software engineers in Germany is lower. 3. Germany has fewer startups. Large companies typically take gender equality pretty seriously, if for no other reason than that they are more risk averse. 4. Germans have the annoying tendency to speak and write in German. So while there may be quite a lot of people discussing problems in Germany far fewer people can read these and none are posted to english language websites like hacker news.

So assuming the problem was equally prevalent at software startups in both countries would expect to hear about it a lot less from Germany.