I obviously agree with both
Biglia is much better than what we saw against Napoli. I'm convinced of that the more I think about. In the San Paolo, he was victim of Napolis high extra-pressing for him, and his teammates playing the ball to him when they really shouldn't didn't help him neither.
The 1st goal was the perfect example of that. Musa plays the ball to Bigly
while Napoli-players were already running-up into Biglias back. And on top of that, the pass was very sloppy and not accurate at all. Biglia managed to restore the ball with a last tackling from the 1st Naples-player, but got overwhelmed by the second. I really blame the goal 100% on Musa and 0% on Biglia.
And yeah, that's just one situation where Biglia got played unaccurate balls while under pressure at the same time. Since Gattuso insisted in playing it smart from the back and there was no other player like Bonucci who could dictate a play as well, Biglia really was the victim of a lot of bad decisions.