Another injustice is that she was required to exhaust her administrative remedies before being able to file this suit in a court. Having been involved in several situations as a union representative, too often internal hearings are little more than kangaroo courts. Administrators will defend incompetent behavior by their managers (or coaches in this case) despite the evidence. So it takes years to get a truly fair hearing.
The concept of "tough love" has been used to justify this sort of thing. What they forget is that there needs to be love before there is toughness. In far too many cases tough love is really a sadistic power trip on the part of the person in the power position.