Sure, you may have wanted Barb to live, or Bob to be a traitor or for Dart to somehow survive and not still be a dangerous, cat-eating interdimensional being who could never be fully trusted, but that simply wasn’t in the plan.
What fun would it be to, instead of occasionally getting plot twists right, you got all of them right?
And, really, do you want a show of any type where the only things that happen are those that you predict will happen?
Who truly enjoys a show with absolutely no surprises?