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

No freedom is absolute.

Revenge porn

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.

Why do most atheists in debates with theists take Bible verses out of context much of the time? Are they lying maliciously or do they not understand theology enough to understand the meaning?

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.

Child pornography

Terroristic threats

Patti LuPone apologizes after she's denounced for 'degrading' comments on Kecia Lewis, Audra McDonald - NBC News

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.

Freedom of speech does not apply to:

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.

How does an experienced gay/bi guy handle a bi-courius guy on his first time?

Conspiracy

Insider trading

Insurrection

How do you handle family members who ask for handouts?

Trade secrets

HIPAA violations

Threats of violence

Suns reportedly trade Kevin Durant to Houston Rockets for Jalen Green, Dillon Brooks, draft picks - Yahoo Sports

Perjury

And much, much more.

False advertising

How many couples swap wives?

Revealing classified information

Fraud