Anti-feminism means that some people (mostly men) disagree with the ideas and beliefs of feminism, which is a movement focused on gender equality and women's rights. They believe that the roles of men and women in society should be traditional, meaning men are in charge and women should stay at home to take care of children and household tasks.
They might think that feminist ideas are wrong because they feel that women already have enough rights and opportunities and that feminists are unfairly criticizing men. Some anti-feminists might even feel that feminist ideas are harmful to society and that women should be happy with the roles they have always had.
However, it's important to understand that feminism is not about hating men, but rather about wanting equal rights and opportunities for all people, regardless of gender. All people deserve respect, safety, and the chance to live their lives to the fullest, free from the constraints of gender roles and stereotypes.