Well, Eric (the brother who blinded and imprisoned Corwin) got whacked (2nd book), Brand (the brother who was really evil) got whacked (5th book), the Courts of Chaos (the power really behind all the trouble) got thumped a bit (5th book), but then you really can't whack one of the fundamental forces giving shape to the universe.
I liked the politics and Machiavellian deviousness of Corwin's family. But again, tastes differ.
"I trust him as I would a brother... which is to say, not at all." --Corwin, from one of the books and I don't quite remember which one.