The secret to a legitimate positive K/D is to put increasing that number above contributing to victory.
Every time you go to the objective or get in a more exposed location to help someone in your team, you risk adding +1 more death to your count.
There definitely are a few modes where that is good like TDM, but when it comes to normal BF game modes, the best K/D is usually achieved by farming kills and ignoring all the goals of the mode.
Yes, as you can guess I am bitter about all the cases where I took so many deaths trying to save the day with a poor team while someone else got a lot of kills while taking minimal risks.
