Its part of growing up. Everyone eventually reaches a point where cynicism and self-loathing take over rationality like that sea parasite that consumes and replaces a fish's tongue. In the past, this stage of development typically occurred around 11-12 years old, and usually people grew out of it by the time they got to the average gamers' age of 18-24. Disney's Bedknobs and Broomsticks (1971) contained a song explicitly about this, entitled "The Age of Not Believing".
But then, something changed. The journey of self-discovery that typified the 50's, 60's and 70's, and allowed for fully mature adults, was all but eliminated in favor of fast, easy experiences. The new generation, so-called "generation X", associated the cynicism and bullshit hopelessness of teenage and high-school drama with actual maturity, refusing to accept love, beauty, and wonder as functional adults unless forced to do so, much later in life. Then we passed that on to our children, instead of raising them as our parents did us, because that was the "real truth", the one we "discovered" for ourselves. Now here we are, almost two full generations of people who refuse to accept that good exists and is within reach; joyless, soulless, empty husks of human beings living a torturous mockery of a life and believing it and themselves superior. So... yeah, good luck with that.
I suppose I should be sorry for my generation fucking up the good things we had going for us in the previous three.
...I should, but I'm not. Screw you, you rotten kids; get offa my damn lawn.