A man who insults everyone is someone who lacks basic social skills and manners. He is someone who is constantly negative, critical, and unkind in his interactions with others. He is likely to make hurtful or offensive comments, often without thinking about the impact of his words. This person may also engage in name-calling, belittling others, and making fun of their appearance, abilities, or personal circumstances. He may also be quick to anger and may lash out at others in an aggressive way.