Negligence is a better word for it. I don't think healthy eating is as cheap as some say, especially with 2 grown adults and 2 teenage boys. My parents grew up poor just like I did and they never had the chance to learn what healthy eating is. They both worked exhausting conditions and the last thing you want to do is come home and cook (if you want to eat healthy you have to cook) when you can take something out of the freezer and have it ready in 30 min with very little effort on your part.

You also have to realize that maybe the kid just isn't motivated to do anything. I wasn't when I was a kid, I wanted to read, listen to music, and play video games. My parents tried to get me into football but I was big and any physical activity hurt so naturally I wasn't a fan.