I too have brought many cars in my 21 years here.
I'm not babbling ,you are just rude
If you bring 2m baht a year into the country you will be taxed. Whatever you buy be it a car a boat or a plane, you will have to do it with money that you have, or are going to pay tax on.
So, you will indirectly pay tax for purchasing that car, the dealer is not gonna send you a bill, but you will pay ,just the same