I favor public education, but let's not kid ourselves, there is not a polity on earth where degrowth would get more than 20% support. It's a weird social media echo chamber artefact that will exclusively sabotage efforts to decarbonize.

Intentionally reducing quality of life in the short term will never win elections, no matter how educated a populace is. The best strategy to reduce consumption that seems to be working is allowing below replacement total fertility rates.