We haven't been serious about climate change and platformed way too many science-deniers up until now.
I found an interesting article on Climate Obstructionism in my country (Ireland). There are many individuals and sectors to blame, such as agri-food, aviation, haulage, and the media. https://doras.dcu.ie/30072/1/Climate-Obstruction-in-Ireland_Kelly%2C%20McNally%2C%20Stephens_%202024.pdf
I imagine a similar article exists for your country. Feel free to share a link.