I've been using MikTeX on my Mint-based Linux machines for several
months now, and really enjoy the fact that (i) it works, and (ii)
well-enough that I don't have to fuss with TeXlive and the silly way it
handles package management, ever again. ;-)
However, while fooling and tweaking with various things, I managed to
'break' the MikTeX install on one of my Linux machines, so much so that
I couldn't even uninstall it. So, in case anyone else runs into this
problem, here is how do do a full, complete uninstall of MikTeX on
Ubuntu-derivatives like Mint. [Worked for me - your results might vary.]
sudo mv /var/lib/dpkg/info/miktex.* /tmp/
sudo dpkg --remove --force-remove-reinstreq miktex
You *might* also need to do a final cleanup running the following:
sudo apt-get purge miktex
These steps work for me.
Q: How can I leave the mailing list?
A: See https://miktex.org/faq/how-can-i-leave-the-mailing-list