Any KDA under 2.0 can be considered "bad" or at the very least "not good."
Also, I went and looked at his last 11 games where he was double-jungling, then ignoring the one game where there were 3 people taking smite in an obvious everyone trying to out troll each other, I looked at his Baron, Dragon and win rate of the remaining 10 games.
In those 10 games, he was 4 W, 6 L.
He got 5 barons, while his opponent got 7 barons, for a net difference of -2/10 games.
He got 23 dragons, while his opponent got 13 dragons, for a net difference of +10/10 games (or on average 1 more dragon than his opponents per game.
Now maybe this was a particularly bad stretch for him, I don't for a second believe he averages 30 more dragons than his opponents, nor do I believe he get 2-3 times as many barons. That's complete bullshit.
Also looking more carefully, he does NOT average >53% winrate doing double-jungling... he makes up for his somewhat low winrate double-jungling by playing a lot of games as the jungler (and winning a lot of those games).