I coach youth baseball and also assist on the 14/15-year-old level as well. Here's what I see that is contributing to a lot of what we're seeing:
* Parents want their kids who they openly admit are "soft" to "get tougher". However, they don't want their kids to go through what it takes to be "tougher". I can't tell you how many parents over the years have literally walked up to me and say "Coach, I need you to make my kid tougher, he's soft". Then after one or two practices, I either get approached after practice or a call on the phone that goes something like this "Don't you think you were a little hard on the kids today, coach? They're only kids." For the record, nothing they're questioning me about as being "too hard" even remotely falls into the category of "crossing the line".
They don't hustle after being told to hustle more than once? They run a lap, do pushups, or both. This continues to be done until they fall in line. I've had some who ran or have done pushups for the majority of the practice. I've gotten where I don't do that as much anymore, after three times and they do it a fourth. I put them in the bleachers to watch the rest of practice and then have a conversation with their parents afterward, with the kid present. The parent's standard and expected excuse of "He just had a bad day coach, he's just a kid and when they don't feel like doing something they don't, HA, HA, HA" is then met with my "Well, when they become an adult, life really don't care what they don't feel like doing. We have to learn that there will be a lot things in life that we have to do even when we don't feel like doing them." The look on their faces is priceless.
*Quitting- Parents pull their kids off teams at the first sign of any little immaterial thing not going their way. We've had parents pull their kids off the team because we werent' winning enough. Yet their kid never sat, got tons of reps and played multiple positions yet quit because we weren't winning rings enough. We've had parents pull their kids because the kid wasn't playing a position they weren't even remotely capable of playing, but was playing very good at the position we had him at. I could go on for another twenty paragraphs but you get the just.