I am glad you had that experience, too, doctor. I guess that's why your articles are so interesting.
The German system is a fascinating one. They limit the number of parties, vote in districts, but then they do follow the proportional method as much as possible.
Gerrymandering does not make much sense in their system, and I heard that if they had to do it again, they'd come up with a single-vote system instead of a two-vote system, and then with same results (more or less).
I think the German example is the best for larger nations in the world. Smaller nations (Sweden, the Netherlands) can handle twelve different parties, while Germany showed us during the interbellum that this was not working well. Large nations need stability.
Yes, the USA system is run by 30% of the voters, so that's why we have these weird outcomes every now and then. The majority can indeed get hijacked by a minority in the USA.
In the German system that is not possible to the same extent. I'd say, they can start running the country by 40 to 45% of all voters.
In Sweden and the Netherlands, that's always 50% of the voters or more.