If freedom of speech is absolute, how come it's not applied for private spaces and for the Internet?

That’s what it is. You have no right to use other people’s stuff. If people let you use their stuff, they can tell you how you can use it, and they can tell you to stop using it any time they want.

False advertising

Fraud

Why do flat Earthers run away like whipped dogs with their tails between their legs when asked simple questions that expose their delusions as fantasy?

Insider trading

If you’re wondering why free speech doesn’t apply to the internet, it’s because you have no right to use other people’s stuff for free.

Revenge porn

The #1 Underrated Vegetable with More Vitamin C Than an Orange, According to Dietitians - EatingWell

You have freedom to travel. If I loan you my car, I can tell you not to take it out of town, because it’s mine, you have no right to use it, and if I give you permission to use it I can tell you what you can and can’t do with it.

Conspiracy

Terroristic threats

What are your political and economic beliefs? How did you form them, especially in comparison to those who hold opposing views?

Trade secrets

Child pornography

Insurrection

Why did my ex of 2 years move on so fast after he left me? Why does he act so cold towards me, and as if I don't exist?

Revealing classified information

No freedom is absolute.

HIPAA violations

What is the best case of “You just picked a fight with the wrong person” that you've witnessed?

You have freedom of speech. If I loan you my computer, I can tell you not to use it for certain things, because it’s mine, you have no right to use it, and if I give you permission to use it I can tell you what you can and can’t do with it.

And much, much more.

Perjury

What caused the decline of the Soprano crew?

Freedom of speech does not apply to:

Threats of violence