The issue seems to lie with players playing the Germans. If they do not reach their "goals" early, most quit and the poor Russian player never gets a chance to have the same opportunities for "fun" as the German player.
I think any rating system should include how their games ended, played to the end, or resignation of one party or the other. This would allow everyone to see someone's past history. Also a method to "report" a game as abandoned by an opponent if no replay in several months, because I suspect many just stop sending turns, and not there is no way to report this behavior.
"Actions Speak Louder than Words"
"Give me liberty, or give me death"
"Pass the salt, please"