The villains of the classic Disney animated films really should have read the Evil Overlord List. Item #4 is immediately relevant to the Evil Queen in Show White: "Shooting is not too good for my enemies." The Queen should have found the quickest, easiest means of dispatching her enemy. She didn't and paid the price for her overly-complicated plan.
Paul Westover and Andrew Bridgman present to us If Disney Villains Were Smart. 6 cartoons illustrate how Cruela de Vil, Jafar, Gaston, Ursula the Sea Witch, and Cinderella's stepmother might have prevailed if they had been just a little bit brighter.