You don't get to be an assh*le and subject everyone to loud exhaust (I looked up his exhaust, it's 105 dB!), and be upset if people call you an assh*le.
Anyone who defends him is essentially saying "it's ok to be an assh*le to everyone around you, as long as you get yours."
Most of these comments are like the car equivalent of Karen the 3x Brady Campaign donor and some Fox News Fudd complaining about someone's gun. The broken clocks might be right this minute but they're still broken.
You know what is? The doings of obnoxious adtech people.
We are not all so lucky. I live one door down from an avenue that does sometimes get these kinds of vehicles and it 100% disturbs me in my home.
I understand that living in a society means that sometimes people will do things that inconvenience me. I am much more understanding of that when the inconvenience provides some clear benefit to the other person in return.
But in this case, annoying strangers is the point. When you're in the car, you aren't hearing the 100+dB exhaust. It's not a necessary path to optimizing the car's performance. It's just being an asshole to demonstrate to the world that they are powerless to stop you from being an asshole.