The issue with K/D ratios is that it doesn't get reset often enough (seasonally) to account for a player's improvement. Example from anecdotal experience, I had a run of 30-40 games a while back without a kill. I can't remember what the issue was, but I was leaving guys with a sliver of life but dying every single time. In and around that same time, I was terrible and had a .75 k/d or something. But in the last month my game's turned a big corner, to the point where I have bounced up to 0.91 K/D and had a 9 kill chicken dinner last night, my personal best game.
I like to look at k/d ratio of the last 30 games (because PUBG lookup makes that convenient) to see where I'm at basically this week.