Let's be clear on what a systemic problem is. The organization has many levels of controls, with employees in different departments to independently ensure that as the organization functions and moves forward, it is doing so in the right way. In this case, the HR, the Line Managers and others have individual responsibilities to ensure that sexual harassment is not tolerated. But each of these controls failed. Worse, it seems like they collaborated to undermine this. This is a systemic problem, as many parts of the system are functioning incorrectly. Now, is this a frequent problem or one off? Usually, systemic problems are frequent as there is reason to believe these controls will be violated / broken again.