>>325557643
Reassess how you're measuring what works and what doesn't then. If I end a game with 2500 damage but only 1 kill, it's not necessarily a worse result than 2500 damage and 7 kills. My teammates could have sucked up all the kills with no more damage than is usual for them, there's a lot of luck and circumstance involved. 
The actual damage number, limbs destroyed and my own number of deaths is a better gauge for my performance. Did I die 10 times when I usually only die 5? Then I know I should think about how I died and whether that situation could have been avoided. Was my playstyle in a particular grinder getting me into inescapable fights? Did I die because I thought I could win this 1v1? Did my teammates die in front of me before I could fire a shot? What could I have done instead?

If you want to improve in any game you need to have some measure of your performance and the willingness to ask yourself these kind of questions. You should also ask whether or not it was still fun. I may have only got 1 kill but it was fun to dance around the enemy and draw their fire for my teammates to take advantage of. I may have died 60 seconds into the round but it was worth it to ram that hoppertranny back to the stone age. These are things you need to figure out yourself first.