WTF...Why?... win lose ratio

Can someone tell me why my stats has anything to do with win lose ratio? Half the time I’m on the receiving end of garbage ■■■ teammate that f-up my stats. Something has got to change. Does anyone else have this problem because I sure do.

More so the amount of kills you are getting than wins tbh.

But rounds won matter to help boost the rank but naturally those that get the most kills also get wins.