For 40+ years, we have had an avoidance of the concept of sin. It's as if sin and evil miraculously disappeared after VatII and we were left with "mistakes" and peccadillos, which were somehow even a little cute and winning as expressions of our charmingly roguish personalities.
I have so often heard priests at the Confiteor suggest in a bright and cheery voice that the congregation reflect on their "mistakes" or their "failings." No more of this nasty sin stuff. And of course, now we are seeing the results of 40 years of being told that there's no such thing as sin. It's blatant, it's everywhere and it has burrowed itself into the heart of the Church.
There is also a lack of the concept of sacrafice that permeates the whole society. It goes hand in hand with the concept of sin. Behavior changes are more likely to be a result of something economic rather than love of God these days.