> "Free speech" means you have freedom from retribution from the government.

No, it doesn't. The concept of "free speech" isn't limited to prior restraint, you're mistaking it for the dominant precedent in judicial interpretations of the the 1st Amendment of the US constitution.

> It doesn't mean your fellow citizens need to stand there and listen to your shit,

Nobody asked you, or claimed this.

> nor does it mean you are entitled to any sort of platform or megaphone.

You should look up common carrier previsions. If we had to depend on your interpretation of law or morality, they'd be able to shut off your electricity for speech violations.

> It means you can scream on the side of the road into the ether and you won't be arrested for it.

If that's all it meant, it would be dumb and useless. What's more, it doesn't mean that, you can be arrested for screaming on the side of the road.

You're wrong in every way you could be wrong.