Patriarchy is a system in which men hold the power and women are largely excluded from it.
Radical feminism seeks to abolish patriarchy. It does this by questioning existing social norms, including challenging traditional gender roles, opposing the sexual objectification of women, and raising public awareness about rape and violence against women.
There's nothing about radical feminism that is about oppressing any gender. Rather, it's about leveling the playing field, and saying that anyone, regardless of their gender, can do anything, without running into the walls patriarchy puts in place.