Is a cult of “personal freedom” that creates its own extinction event and alters the climate of its own planet to make it less habitable more or less insane than Marxism?
The fact that capitalism is able to channel and bring to productive efficiency greener solutions out of collective individual preferences for a better world in spite of the artificial rolling economic treadmill, is a testament to capitalism.
Kyshtym, Chernobyl and Aral Sea disasters have no relation to the "cult" of personal freedom in any way.
The only reason the Western / capitalist world had a greater impact on the planet is because they were able to build industrial power faster than the Marxist countries, not because they were less concerned about the environment (looking at the Soviet Union and China, I would rather say the opposite is true).