The matching sucks. But I have a serious question

After I made it into champion (>5000), my victory percentage is around 25%. It ain't fuckin me, I'm closing in on 8k now, and routinely have 7-10 kills, or more. Wtf. This is frustrating. People die a couple times them bail.

/Rant off

For the life of me I can't figure out how to get the gems or whatever they're called to upgrade motherships. Can someone clue me in please? Thx