Yunfei Lin has worked at various IT firms across the industry. Upon reflection, she observed that some of her previous workplaces tended to recruit unsuitable candidates, retain unethical staff, dismiss competent employees for unknown reasons, and promote individuals based on flattery and nepotism. As a result, she once missed out an IT manager position at one such firm and was denied her fair share of a performance bonus at another. However, Yunfei is now satisfied with her current workplace. This story suggests that each of her previous managers demonstrated ineffective -多项选择题