Is Atwood’s novel ultimately a feminist work of literature, or does it offer a critique of feminism?

Yes, her novel is ultimately a feminist work of literature. There are many examples that highlight this.  Moira helps express these feminist ideas, and Offred helps reiterate many of the ideas that influenced the novel. The most important idea was Moira’s belief that living solely with women would solve many of the problems women were facing in that dystopian reality. In an ironic way, the new structure of society in Gilead creates a support system for women by women; Most women here had little to no contact with men. Women are expected to support each other in times of birth, death and sickness. Women teach other women about the new regime. Within a household, women work together to fulfill the different functions of their gender.