What does Nettie not like about the Senegalese?

When she first sets foot on Senegalese soil, Nettie is highly enthusiastic. She feels a real sense of homecoming. At long last, she can openly express her racial identity as a black woman without fear. Soon, however, she becomes somewhat disillusioned by what she sees in this French colony. Although deeply impressed by the sheer blackness of the Senegalese skin color, she does not think much of the local people she sees in the marketplace. All they seem to care about is selling their produce. If you are not interested in buying anything they have to offer, then they look right through you in just the same way that they would if they were dealing with white French colonialists.
This unpleasant experience challenges Nettie's somewhat romanticized notion of racial solidarity. Skin color is one thing, but the traders in the Dakar marketplace still have to make a living; they are not about to treat Nettie with courtesy and respect simply because she is the same race.