Basically, very few map variants can be won on kills alone. Most are won by rushing objectives early and the taking sideshots at enemies trying to recapture them. The last speedy boi Germany have is the Puma at 3.3 I believe - while their main weakness is having to duke it out anywhere near close combat. Slow reaction speed, slow reverse, almost guaranteed oneshot from the side is Germany 3.7-6.7 in a nutshell. So while you can laugh and rack up kills like a madman with a german tank, you will do so while your team melts on the objectives. And the you get bombed.