Thanks for much detailed comment. That helped me alot and answered all of the questions from my head. Eventually, I am not a criminal or activist. Looks like its secure and private enough. At least there is some eyes as Meta, Google etc. I will mind self-hosting. Thank you again for your labor. Goodbye.

Most sane CS player.

I understood clearly what you said. Thanks for detailed text. The protocol uses end-to-end encryption, yes. But, I didn’t understand what type of information is being leaked. Do you mean e-mails, phone numbers, profile pics etc. as metadata? If I use another server or self-hosted server, can I avoid the leak. And not only matrix.org, Element uses same types of informations. Element’s permissions was a bit high in Android, Flatpak etc. I’m using Element on my GNU desktop and not on phone. No phone number, no profile pic, no e-mail; only username, server and password. Do I still give information?

Thanks to previous comments, understood the thing I was wrong and decided to use Arch relaxedly. Now I’m using Arch. Thanks. Have a nice day.