Hello Woko Haram,
You could buy a car directly from a very small automaker but it would be really expensive because the only way to get the price of something down is to build a lot of them at once. Tesla sells directly to customers from the factory through it's website.
Not all States prohibit car makers from selling directly, although most do. Once again, look at the source. Who makes up these rules? Hint: It is not the general public. It is the greedy super-rich telling government what to do and forcing them to do it with the power of big money.
It's not the government telling you what to do. The government is the middleman being used by the greedy super-rich so you'll blame the government instead of who is really behind it.
The only power we should give government is grass roots power. If it came from the general public it is probably better for the general public than if it came from the greedy super-rich.
Always look at the source.
All I'm saying is that I don't understand why you believe that any party would somehow change this dynamic. No matter who you put into power, government will favor the elite. The only difference is which elites get favored. This is why I support reducing the government's role. I try to vote for whoever seems to be less interventionist in business and personal affairs. That's the best you can hope for regarding government.