Who was Bob Ewell bothering?

Bob Ewell is a character from To Kill a Mockingbird, that accuses a black man (Tom Robinson) of abusing his daughter, when it was really Bob Ewell who abused her. The Ewells are a poor family because any money that Bob Ewell makes he just goes and spends it on whiskey. Later he attacks scout because he is angry at everybody involved in the case because he lost his dignity, and Boo Radley kills Bob Ewell.