https://hbr.org/2020/03/how-to-spot-an-incompetent-leader
If you want to understand why some companies have a toxic culture, underperform relative to their potential, and eventually collapse — look no further than the quality of their leadership teams. Whereas competent leaders cause high levels of trust, engagement, and productivity, incompetent ones result in anxious, alienated workers who practice counterproductive work behaviors and spread toxicity throughout the firm. Consider that the economic impact of avoiding a toxic worker is two times higher than that of hiring a star performer.