I have just installed the final version of Ubuntu 20.04 LTS desktop system from ubuntu-20.04-desktop-amd64.iso.
After two days of testing I completely do not like its graphical interface - the GNOME Shell.
Even installation of GNOME Flashback does not help either.
So I want to completely remove the GNOME Shell with all its trails from my system without re-installation.
Just want to start from scratch like it was approximately if I have installed Ubuntu from minimal network boot ISO.