I grew up dressing up and trick or treating and I let my kids do it too, and we might do some minor decorations, but I honestly feel this internal revulsion at a lot of it. I hate Halloween decorations. I hate the idea of this empty, cartoonish version of horror and death that people spread all over their yards and houses. I also hate the candy orgy it creates. I just have this gut negative reaction against all of it.
ETA: I don’t really “hate” it, I like watching my kids enjoy it. But certain aspects of it give me a dissonant feeling.