Pretty much all of my YouTube ads are for TV shows, movies, cars, mobile games, consumer products, and various consumer services. Volkswagen, Dove, TurboTax, etc. All incredibly mainstream.
Maybe you're located in a country or region maintain advertisers avoid?
I'm honestly not really sure why you're complaining. If you don't want to be tracked or profiled, you're going to get the lowest quality ads. Why do you think higher-quality advertisers should be wasting money trying to reach you, when you are going out of your way to avoid any interest in them?
To be clear, I'm not criticizing what you're doing to avoid tracking, or your stance against it. But I'm questioning why you would then complain about the ads you receive.
Youtube/google ads? Never bought anything, automatically assume they are a scam.