Apart from Del Piero, that really isn't true. Even Chiellini was targeted for having a sub-par season last year. This just sounds like more excuses for Marchisio and no, you don't get it.
No, you don't get it. I don't need to explain it but I'll just say it anyway and you will automatically lose credibility.
I'm not just talking about the knee-jerkers on this forum, new players will clearly get a longer leash to make mistakes and also our players who have achieved more than Marchisio. They deserve it. On this forum have I seen guys like Chiellini and Buffon ground down - by a minority - with bad result after bad result, but that's no real surprise. Players all become very human in a shit team, which is why I am loath to criticise individuals who are neither here nor there. It's not really about them.