A responsible right-wing party identifies problems and proposes governmental solutions to them that are based on the use of the free market and traditional values. Today’s GOP has no interest in doing that; its mission is to prove that government can’t do anything right, even when Republicans are in charge. And so, for example, instead of suggesting market-based approaches to climate change, the mainstream of the GOP simply denies that it exists.
If you were wondering why the GOP did nothing of note when it had complete control of the federal government in 2017-2018 other than cut taxes for the wealthy, that is the reason. It is also the reason it didn’t bother with a platform in 2020. The actual, unspoken platform was for Trump to finish destroying the “deep state,” not to do anything positive for the American people.
This is nihilism, not conservatism, based on the culture war concept that the government is at war with the values of real Americans and the unenlightened self-interest of the tax-hating donor class.