CRI cannot be the issue with GGGP because he writes that LEDs "are still awful compared to incandescent bulbs" and we know that incandescents (being very low in the blue part of the spectrum compared to its output in the orange and the red) have worse CRI than even the crappy LED bulbs.
CRI is also not why I dislike most LED light bulbs either.
I'm not sure where you're getting that info, but it's wrong. Incandescent are blackbodies and as such have perfect CRI. Their color temperature is different from daylight, but CRI is measured using a source of the same color temperature for reference. A candle also has perfect CRI.
Also, to be clear, I'm not claiming that CRI is the root cause here, rather that it should indicate if there's a spike in the blue.
CRI is also not why I dislike most LED light bulbs either.