It's because they think for you to be the best team you have to dominate games. It should show his tactical ability that he can manage these games and get wins even when the other team dominate possession.
Had Martial laid the ball off to Bruno, James done better with his chance and we gotten the penalty and it would likely be 4-0 then this would be one of the best performances this season from any team. Unfortunately we haven't taken them all, so it could be an edgy second half despite the performance. Ole can't be blamed for that.