Demand destruction is a specific concept in economics where high prices for something cause a lasting reduction in demand. The other comments explain typical mechanisms for this, like high prices for fossil fuels spurring on electrification of machinery powered by fossil fuels, which then reduces the demand base for fossil fuels. Or the downturn of economies being accelerated by fossil fuel pricing pressure, increasing deindustrialization, and reducing fuel demand (e.g. what europe is experiencing).