We need it because, believe it or not feminism and equality are misused. Rights do not come at the cost of other people. But at the same time feminism does not become synonymous to fake feminism. More often than not when you say you are a feminist, you get trolled at the cost of fake feminist. Wrong. Both scenarios wrong!
Yes, it is difficult. Being an equalist means you fight against your own father, brother, sister, husband, but it in no way justifies when you use your rights and freedom against someone else, or you hurt people in any way possible. Feminism does not mean you hurt someone, misuse your freedom or fall down to the level of patriarchy. We want equality, not superiority.