We're eating each other to survive because we've been sold on the idea that there isn't enough room for everybody, but we're eating each other in a metaphorical sense rather than the literal.
I don't think the film presented the rampant misogyny in order to endorse it.
I think it's generally useful to assume that depiction isn't necessarily endorsement. Otherwise you risk mistaking Paul Verhoeven's adaptation of Starship Troopers for pro-fascist propaganda or misreading Margaret Atwood's The Handmaid's Tale as a blueprint for the ideal American society.