Correct me if I'm wrong, but I think you'd have to be making well over €300k in order to have an effective tax rate above 40% there—normal for senior engineers at FAANG in the US maybe, but definitely not as normal for the same roles in Europe.
The person who set off this thread made no claim to be a typical Berlin developer, he just said that he paid 42% taxes, and someone challenged that claim. If everyone's being super careful about using very precise language, fine, but that needs to be everyone being super careful about using very precise language, not just people you disagree with.