Working in HR, and specifically with developing/helping people grow, I see this every day.
A few years ago, I was teaching a class and was talking about integrity. I said, what's really telling about a person isn't what is said to them...it's what people say when the person isn't in the room. I went on to say that I hoped that if I walked out of the room that we were in, and someone asked the class what they thought of me, they would speak highly of me. That matters to me. Almost immediately, someone in the front row interrupts and says "I don't give a f*** what you (me) or anyone else thinks of me."
That really shook me. And since then, I've had others share essentially the same thing.
I don't get it. How/why did we get to the point where people just don't legit care about others, and further, don't care what others think about themselves.
To me...it's sad.