Parents today won't let their kids play out in their own neighborhoods, much less go to a playground unsupervised. Parents today have to supervise every event and if little Suzie gets her designer jeans grass stained it's the end of the world. If little Johnny's team loses then they call foul and claim everyone's a winner.
As for that kid who quit football after 20, I dunno. While I've know more than enough bully coaches, I leaning toward that mama and kid were just whiny babies.
More's the pity. In the days of my youth, a friend of mine and I would take about 8 baseballs to a field and take turns pitching to each other. When one guy had hit all of the balls out of the infield, we'd shag them, and the other guy got to bat.
I coached youth sports for many years, mainly baseball, football and basketball. Although there were some jerks who were coaches, most of the coaches were great guys and gals who had the best interest of the kids at heart.