Put yourself on a limit, if you go negative on 3 consecutive games, go do some strikes an come back after in a new lobby, the same if you loose more than 4 games in a row, try to go positive even if you loose the game. You can do it buddy, keep trying and if you playing solo like me just try to help but concerning about the well being of your guardian. I being in so many games were your team mate wait until you get kill to come out and get the enemy thar you almost kill.