K/D is a horrible indicator to determine if someone is hacking in this game. I went something like 118 - 10 defending in a Breakthrough match on Stranded. Which was easy because the A.I bots were lining up in front of my minigun. In fact there were maybe four on each team with a K/D similar to that.
I can see how someone joining this match later might think there was hacking going on. Only until more human players are migrated into the server to join those that were there from the start. People are already feasting on the bots and the score usually reflects that.