I am desensitized to the sort of violence in this to a large extent, not because I see a particularly excessive amount of it, but because I get sucked out of the horror of the moment by the technicality of the achievement. Those creatures in Ep 1 were UTTERLY brutal. but were one of the most impressive things I've seen for while, and any empathy I may have for the predicament of 3D characters is largely stymied by the brilliance of the execution (and I mean that in both senses !). It's damn hard to realistically smash a 3D face, and bloody reds are a great colour scheme :)
The sheer volume of violent content available isn't necessarily indicative of a world that is more violent than it used to be (aggregate long-term data suggests the very opposite; that now is the least violent time in all of earth's history - there is slow, gradual upward curve toward enlightenment values and away from violence. Personally, I value that the only violence I am exposed to is safely delivered to mostly fictional characters in our entertainment media, where of course it has a justified place as one of the more unsavoury parts of the human condition...