These stats are "killing ratio oriented" when the Ftag game is, in my opinion, a team game where it is as much (if not more) important defrosting team mates as killing enemies.
Anyway, it is my way to see the game. It is the reason why I don't care to be killed (even if I say very often: "shit" and "fuck" and other rude words in French - it's better not to translate them ) but try to win the match by defrosting a lot (and I'm killed a lot when doing it). As a result (and also because I'm not so good), I get an overall shitty ratio. But really, I don't care as long as I have fun playing.
Maybe, you should not play on Ftag servers (but f.i. other XI servers not Ftag) if you are mainly interested in getting good killing ratio and stats.