It WAS Russia because it consisted of the Russian cities like Novgorod, Smolensk, Moscow, Nizhny Novgorod, etc, which were taken away from us by the Golden Horde and Poland/Lithuania. Moscow just happened to be the strongest princedom (not tsardom btw, the rulers of Moscow were all princes aka knyaz until the unification of Russia) that managed to unite them all under one Russian banner. HRE was more like a union which wasn't entirely German (it also had Schleswig-Holstein, Croatia, Bohemia, Slovenia, Lorraine and Alsace in it that weren't German at all)
Also, don't ridicule my point. It's not about some metaphoric conspiracy, it's about the incorrect name for my country used by Ukrainians (who created the addon) which offends me because that name is in 99% of the cases used in a negative context. It's like if the Cossack Hetmanate was called Hohlostan or something like that.