I think a better way to phrase "a government that is undemocratic" as "a dictatorship".
The idea that democracy is the only system of government that can possibly represent the people is a horrendously American view of the world.
To show an example that counters the "everything that isn't democracy is oppressive" claims I usually hear, have a look at Lichtenstein (which admittedly is partly democratic but is also a constitutional monarchy), where the people voted to give the monarchy _more_ power and refused to curb it in a referendum: https://www.bbc.com/news/world-europe-18649156