Points, at least at my rank, are primarily impacted by winning or losing the round — so by extension by teams completing the objective. That is to say that my kills are worth squat and dying owns me, so to make up I have to plant/defuse/rescue/win every round. I ranked up relatively quickly by killing lots of people, but now the point system encourages that I play for a win each round, especially wins by completing objectives.
Playing for the objective is good. Heck, it’s part of the MOTD!