Why did Phyllisia become disgusted with Marian in Rosa Guy's The Friends? I only have four hours to get the answers.

According to Phyllisia, Marian "liked everything about me
but me." Marian seemed friendly enough, but Phyllisia was turned off about all the nice
things she said about others--but not her. Marian imitated Phyllisia's sister, Ruby's,
hair, and Marian's mother thought Phyll's mother was one of the most beautiful women
she'd ever seen. But the two seemed to part ways when they disagreed over a boy who had
been friendly to Phyllisia. Marian seemed jealous, and she tried to convince Phyll that
the boy was "not so hot" up close. But later, we find that Marian has gone out with
Norman. Phyll finally gets tired of Marian because she is so "uninteresting"--not like
Edith. But the last straw was when Marian said that Edith looked like something "that
the dogs dragged in." This remark made Phyll hate Marian more than
ever.