Bluetooth speakers, make the beach, train journeys, picnics etc intolerable.
Smartphones, have sucked so much joy from the world (she says hypocritically, writing from her smartphone!).
Disposable anything: cups, cutlery, plates, straws, tablecloths.
Plastic loops that hold beer cans together - in fact, plastic anything.
We rarely buy children's magazines, but those have been Lego it Playmobil and DS has still got all the pieces, plus it has encouraged him to read and he likes the puzzles. Around 4 years ago we bought him a Peppa Pig magazine at Christmas which had a little free torch with interchanging lenses, so you could see FC or a snowman etc. He's just turning 8yo and the torch comes out every Christmas.
Netflix/Amazon prime - so much time wasted on my bum!
Electric scooters for adults - dangerous fucking things that go too fucking fast.
I could go on 