How do we know the coaches didn't give up on them as other posters have said maybe the coaches told them that they were going to be relegated to special teams and that she be thinking about looking for another team next year. I the coach told me that, basically saying no matter how much work you put in, your never going go have any meaningful role here, I would do whatever was in my own best interest. Not that the coaches said that be we don't know that they didn't either.
Casting judgment on these kids with only a fraction of the story is wrong. If it was my kid, I would encourage him to stick the year out at least.