We know that the press is likely to hold the Labour leader to a higher standard than anyone else. That's obvious and not particularly controversial. We know that the press are going to hold a left wing Labour leader to an even higher standard. Again, I can't see how that's controversial.
It doesn't mean we need to defend Corbyn every single time he loads a gun, puts it against his foot and dares the press to pull the trigger, though. The problem is the sheer amount of ammunition he gives the press, as much as it is any media bias.