With the recent update, low player count, and lots of bots, I managed to do this without even realizing I had the first kill.
Turn off crossplay
Here's why I think this is "easier" now: I rode the plane all the way to the end and was about halfway to the ground before I got back to my game and started playing. Most games have numerous kills already by this point.
I landed, ran into a few huts, grabbed weapons, not rushing at all. I hear a player approaching, obvious bot, killed them, then the achievement popped. I never even noticed the player count hadn't even dropped by that point. My only assumption is that bots don't kill each other too quickly early on in the game.