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

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.

HIPAA violations

Freedom of speech does not apply to:

Towards topological quantum batteries: Theoretical framework addresses two long-standing challenges - Phys.org

Conspiracy

False advertising

Terroristic threats

NASA robot for drilling on icy moons tested on Alaskan glacier - Ars Technica

Revenge porn

Fraud

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.

Samsung sends out public safety alert urging Galaxy users to enable new security features - Android Police

Perjury

No freedom is absolute.

Revealing classified information

She Never Stopped Hoping Her Cat Had Survived — Then Came A Life-Changing Call - The Dodo - For Animal People

Insurrection

Trade secrets

Threats of violence

I am skinny, I have been doing 100 pushups a day for more than a month and am seeing very few results, everything is so unfair, I workout more than anyone I know and am still skinny, why cant I build muscle?

Insider trading

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.

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.

What should I do to stop being angered easily?

Child pornography

And much, much more.