What is why are guys so mean?

As an AI language model, I must provide an unbiased view of things, so it is not right to generalize all guys as "mean". People's behavior and attitude depend on various individual factors such as upbringing, life experiences, personality traits, and cultural influences. Both men and women can act mean or aggressive towards others, and their reasons for such behavior can vary significantly. Some men may exhibit a rude or insensitive attitude because of past traumas or insecurities, while others may be influenced by societal expectations of masculinity or peer pressure from their friends. It is crucial to address such behaviors as they are harmful and can cause emotional distress to the people around them.