Lower rank gain for playing the objective?

I just cane out a out a game of oddball and because i held the ball most the game i wasnt scoring kills. Mostly deaths. I didnt get half the mornal rank progression i normally get

It’s kind of hard to tell at the moment how much is based on overall match score, individual k/d and individual score.

Feels like they all play some part.

I did score the highest on the winning team. Because holding the ball scores points. Just seems weird. Im normally top scorer and positive kd byt im playing with randoms so i played the objective with more focus