The usual criticism is that it means every human emits the same, which is extremely tied to consumerism level, i.e. level of living, since in the climate universe, we have far enough access to consumerism and we're not limited by resources, but by emissions. And, like every policy claiming equalitarianism-for-all, it means it's no worth working if you'll have the same right to consumerism. Criminal, hard worker, bad country, good country, all equal humans.
The second criticism is how it's impossible to impose less consumerism to another country, let alone a megacountry, so this climate scheme has always been just about limiting the Western civilization, generally by people who go length to explain what Whites have done wrong in the world.
The Paris climate accord is a racist ideology that means that I should disappear. Typical from the 2012 era, but outdated in the 2020ies, and the more people claim that Whites should consume less, the more the world will burn in flames.