KDE’s Discover pretty much does what you want in terms of being an all-in-one GUI package manager. If you're comfortable with the terminal, topgrade
can upgrade pretty much everything and offers great flexibility is terms of configuration.
Also, a good rule of thumb is that, if you want GUI programs thats show up in “start menu”, search specifically for GUI programs. In this case, that would be something like Peazip. In KDE, the file manager Dolphin can extract stuff for you using Ark, which is installed by default.
I don’t think it’s reasonable to expect CLI programs to appear in the “start menu” because they are usually intended to be launched from the terminal.
Intolerance is not to be tolerated.