I don't think we can buy that it's purely coincidence.... The perfect Storm of turnovers only happening when he's on the ice?
Sure, I'm sure some of it is due to poor team defensive play, goals are really one person's fault, but that many goals?
It's also corroborated by the eyeball test and the fact that his partner also sucks.
Is it solely on Trouba? Maybe, maybe not. But his play has gone steadily downhill which is the reason he was moved to the third pair to begin with.
My guess is, he's still feeling the effects of whatever injury he had. Even his timing on hits has been poor, even for him.