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

Freedom of speech does not apply to:

Revenge porn

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.

Which bands became massively popular for covering songs rather than recording originals?

Trade secrets

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.

Threats of violence

How do you deal with a neighbor stealing?

Revealing classified information

Perjury

HIPAA violations

How many of you have had your parental rights taken away because of lies and no truth whatsoever, and did you prove the lies that were told about you to be false either through drug testing or another way, but still had your rights taken?

And much, much more.

Fraud

Insurrection

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Child pornography

False advertising

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.

What caused the decline of the Soprano crew?

Conspiracy

Insider trading

Terroristic threats

What specific economic and social impacts would result if all climate change policies and regulations were immediately repealed worldwide?

No freedom is absolute.

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.