Why does fanny criticize lenina?

Fanny criticizes Lenina primarily for her uncritical acceptance of the World State's values and her shallow relationships. She expresses concern that Lenina is becoming too attached to Bernard Marx, which goes against the society's norms of casual relationships and emotional detachment. Fanny believes that Lenina should embrace the state-sanctioned lifestyle of promiscuity and avoid forming deeper connections that could lead to discomfort or instability. This reflects Fanny's adherence to societal norms and her desire for Lenina to conform to them.