The Germans actually have a stellar set of rules and they are followed pretty much.This is true.
I got the opportunity to drive a rental car in Germany in 2017, and I got up to 201 kph (125 mph). I was going faster than many, but there were more than a few Mercedes and BMWs that flew past the stupid Citroën I was in.
But comparing those roads to I-465 is very unfair to the Germans.