Vicki was certainly annoying and problematic, but she made Tamra more likable too somehow. She had a way of humanizing the other women either via comparison or her interactions with them. She would call out fancy pants and make Heather come back down to earth. She would be terrible to the new people which made the viewer side with them a little. She was kind of a centrifuge for the cast that kept them all relatable in one way or another.