How accurate are the stats?

I been looking at the stats and what I can see they aren’t correct or maybe I’m just misinterpreted the stats.

I made a quick JSBin to prove my point. This script summeries all the maps kills/deaths and shows the actual K/D.

Side note: Can you somehow add ADR into the stats? It’s a very important missing data. K/D is nice but I would argue that ADR is more important. High K/D with low ADR means that he is the last every round/lurk. I think it’s important to show ADR combined with K/D to tell what the player type is.