This is a pervasive problem in companies that foster internal competition in their corporate cultures in a negative way. When people put others down, or consistently throw others ‘under the bus’ in workplace settings it’s like living with Dr. Jekyll/Mr. Hyde colleagues. Most individuals who operate like this are deeply insecure and unhappy people, they play out insecurities in the workplace. Totally agree, not worth spending any long period of time in companies like this, regardless of how attractive the $ is.