Her disqualification came after she was issued two strikes, a warning and a series of actions that go contrary to the rules and regulations governing the house. Examples include, refusing her deputy HOH, Prince from sleeping in the head of house lounge and threatening to kill her fellow housemate, Laycon.
According to Big Brother, she could have vented her anger at Laycon and walked on but she kept repeating her threats and desire to fight even when her colleagues tried bringing her to order. Another action she was found culpable of was the fact that she peeked into the camera window and defaced the glass shield.
She failed as a leader of the house as her actions graduated to complete disrespect of house rules and her fellow housemates. Biggie issues her a third strike and disqualified her from the show.