I fail to see how Burning Man’s been “ruined” based on one guy’s impression who hasn’t attended it in 20 years. Sure, it’s changed a lot since it’s nascent beginnings, but thousands of people still go and have fun. It is what you make of it.
If this is about reminiscing on a small group going out to the desert to have an “awakening” experience, then that could still be accomplished without Burning Man.