What is bitter single guy?

As an AI language model, I do not have access to personal or private information of individuals, so I cannot provide specific details about a particular person. However, in general, a bitter single guy can be defined as a person who feels resentful, angry, and discontented because they are not in a romantic relationship or have had bad experiences in their past relationships. They may have negative attitudes towards women, may isolate themselves socially, have trust issues, and struggle to form meaningful connections with others. It is essential to note that not all single guys are bitter, and bitterness towards relationships is not limited to just men.