K/d says nothing about a combatant, not in this game.
You don't see WaltF4 at the top of the list, but everyone knows that he's a perfectly capable fighter.
Most fighters who are a massive support to the team are extremely underrated, and you never hear of them.
High profile, high k/d ratio fighters *can* be seen as a credit, but more often than not, they tend to be cherry picker cav or over-armored flamberge spammers.
The ones who dole out the most overall damage tend not to get kills because the crazy teammates are pining for that kill to see if people start talking about them.
Again, prime example being Walt, who can demolish an opponent if he wants, but prefers to play a support exclusive role, which gives his teammates the glory, and keeps barely any for himself.
