Since I stopped trying to play it like the rest of the team (rift camping etc) and started playing tactically (get near the spark, and either grab the spark, or run as a blocker/sacrifice for the spark runner) been getting much better. Also don't care about K/D. The objective is to score, having a 5.0+ k/d and no runs/captures means epic fail. TL:DR Protect the runner at all costs, k/d is unimportant