thanks - I didn't know about this. I actually like and enjoy this it's just that it's missing polish but this is not the fault of the devs who do hard work for an difficult and almost impossible problem without lot's of ressources and even then it's still difficult to get right.
You are allowed to run SQLite instead, install package `akonadi-server-sqlite` and edit `~/.config/akonadi/akonadiserverrc`. Unfortunately, `akonadiconsole` does not offer this customisation in the GUI for some reason.