Why did they choose such an abysmally shitty green?

It’s too desaturated, washed out, and slightly too far to the blue side of the spectrum (like a blue spruce tree). It reminds me of Porsche’s equally abysmal RS Green from the 997.1 GT3 RS:

Compare that to the richer/warmer Viper Green, or even the lighter Gelbgrun (yellow green).

Another particularly bad offender is Ford’s Gotta Have it Green, which manages to get the color temperature right, but is so washed out that it still looks like shit: