neither stat is imoprtant to begin with, they are both pub stats. pub stats are meaningless.
keep in mind hat most if not all pub stats are attained from playing against bad players. whether or not they are better than you or you are better than them, if you are playing pubs vs anyone ;more than likely they aren't any good at cod really. so, if anyone has so much trouble playing vs bad players that they get a negative k/d for most games, they are bad . having a positive w/l, even if its just a 1 it means that you contribute enough to the game to get a win for every loss. if i had to choose i would take a guy who is decent enough to at least go even vs bad kids and can ontibute enough to a win.
both k/d and w/l are easily manipulated by anyone with any brains so your pubs stats mean nothin as long as they are 1 or above. if any of your stats are negative and all you play is pubs, YOU ARE BAD. no ifs no buts. if it makes your delusional baby nuts feel better, ill say you aren't very proficient at call of duty
playing with or against someone on the regular is the only true way to gauge their skill. pub stats really cant tell you that much about a player. the best player on my FL has a .75 k/d and an even worse w/l because all he does when he plays pubs is ninja defuse in search. he is however a monster of a player, he is ranked 33rd on gb and hasn't lost a single gb match for months now.