First ten matches determines your rank if you haven't played one yet this season.
Then it becomes a running average. So if ranking up is determined by win/lose streaks, no matter how good or bad you performed in the team, you still can lose rank? I mean, true enough not all matches are balanced accordingly; there will be those that will experience technical problems, performance anxieties, and mid match collapse, or just plain d i c k s who vote to surrender when they got the chance to see the surrender option for lack of skill. But how does ranking up and down work if you're matched with a bad team of randoms?
It doesn't... you end up carrying the burden of being ammo supplier, objective specialist and medic all in one session and this is not what the game is about. Teamwork is not there and why should rewarding be made proportionate to those who drag the team down? Sure, there will always be top scorers and least ones, but the difference in team score might be because a Sparks player chose to hang back and revive team mates and at the right moment deliver the objective.
Can someone please elaborate the mechanics of how ranking works?