I honestly don't really remember, but my worst game in recent past, I think I was roughly 6-9 kills and 15-17 deaths.
Had a team who had the momentum and just completely steam rolled my team in a round of control. Non-stop supers it felt like. No one on my team went above .5 KD, this was early on in my (short) crucible career where I struggled hardcore to go .80-.90
Just how the cookie crumbles I guess.