It’s probably three to one....Brits reporting on Germans. However, if you were to say the magic word “American”....the Germans probably publish an eight to one negative commentary on Americans.
You omitted your observed numerical ratio for America on Germany.
Btw - I would say British on Germany is easily more like 10 to 1. The London press is notoriously anti-German. Almost as if WW2 is still going on - LoL!