These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: The Witches
Anti-Climax Boss: Despite being described as a nigh undetectable race capable of horrible deeds, yet never getting caught, it was very easily to turn all of them into mice without the possibility of them using magic to reverse the transformation.
Somewhat justified, in that the witches of the piece mainly employ potions to destroy children. The only act of magic we see in the book or movie is the Grand High Witch "frying" one of her subordinates. With no sign of defensive magic, turning their own potion on them makes a degree of sense.
Award Snub: The film failed to get any Academy Award nominations, especially for Angelica Huston's role. It did receive numerous other awards, including Los Angeles Film Critics Association Awards and National Society of Film Critics Awards giving Huston the prize (in a dual nomination for The Grifters.)
Complete Monster: The Grand High Witch, the witches' leader. At their meeting, she wastes no time berating the witches of England for only getting rid of one child a week, considering it too good for them. As it turns out, she has a plan to murder every child in the country. When one witch gives a shocked exclamation of how impossible that is, the Grand High Witch incinerates her- a practice she makes a habit of at every single meeting she ever attends to keep the other witches on their nonexistent toes. Her plan is simple: utilize a potion to turn every child in England into a mouse, and watch their own parents kill them. Unlike the other witches, she has no regards for collateral damage in her schemes. If an adult ends up transforming into a mouse by her potion, she says it's too bad for them as well. Amongst an entire Child Hater race, the Grand High Witch utterly outstrips the other witches in evil and cruelty, and everyone who meets her from the young hero, to his grandmother, and her fellow witches, are absolutely terrified by her.
Even scarier in the book, when you realize she's worse than creatures that will turn your own child into a hot dog and give it to you to eat — or turn them into a pheasant the day before hunting season.
Evil Is Sexy: The Grand High Witch, although averted when she's not wearing her mask.
Esoteric Happy Ending: Subverted. The book seems to be coasting to a happy ending, but turns out more bittersweet.
Moral Event Horizon: If the plan to turn all children in England into mice wasn't horrible enough for you, the Grand High Witch pushes a baby in a carriage down a cliff to draw Luke out.
Most Annoying Sound: Luke's voice in the film. Especially the point where he keeps shrieking "Grandma!"
Nightmare Fuel: Both versions of the Grand High Witch, the book version is filled with heavily implied Fridge Horror of hiding even worse things under her dress just by the fact her face looks rotten. The movie has her being a very hideous depiction of a hag.
Any woman can be a witch, can capture you at anytime and smell you out if you try to hide.
Particularly when female teachers read the book, as Dahl includes a passage that starts something like "perhaps even your lovely teacher is a witch... she might even be smiling!" And every kid in the room suddenly starts inspecting her nostrils and the color of her teeth.
Squick: In the film version, Bruno's father flirting with the Grand High Witch. He hasn't seen what she really looks like but the audience has.