"But i'm pretty sure I don't get the kill unless I finish off the downed enemy right? So he was complaining about nothing. Maybe thats his thing he says to people so he can be the one to down them. Its a freaking team game, come on..."
Actually, im pretty sure that if you down someone, you get the kill non the less. If he doesn't get helped up that is. So downing the whole squad will give you kills.
Therefore the priority should be to finnish of the squad before killing someone.
I usually hit a downed target to draw his squad to me, hoping that the downed guy screams in mick or calls out for help. Baiting! 👿