So China must be a paragon of eco-friendly, right?

If every country was doing as well as China right now, the world would be a much better place. But the Chinese advantage is largely in its cutting edge industrial capacity. A bit unfair to hold Vietnam or Cuba to the standards of a tech giant.

It must also mean that there aren’t capitalist nations the means and innovation for protection of the environment, right? Right?

Economic central planning that forecasts the consequences of ecological degradation on a 5, 10, and 50 year time horizon will lead administrators to policies that individual businesses fixated on quarterly profits and annual executive compensation packages don't want to embrace.

Past that, a big part of what the Chinese environmentalist project has been about is experimentation. They've done manual reforesting along the Gobi Desert. They've done nuclear energy R&D. They've done carbon capture projects. They've invested enormous sums in their space program.

Most of the western R&D and infrastructure development has been limited by what the O&G industry is willing to directly invest in (carbon capture, converting from coal to nat gas with supplementary wind/solar, carbon credits and other forms of green financialization) all of which are designed to immediately enrich their bottom lines. That's not even considering the deliberate efforts to maximize fossil fuel usage (the Texas ERCOT grid refusing to buy cheap renewable/nuclear power from outside the state, various states threatening to prohibit/tax electric vehicles and renewable energy power systems).

To conclude capitalist rent seeking isn't guiding any of these policies is deeply irrational.