The true Scotsman fallacy is not relevant here because the modern concept of democracy is a constantly evolving term. The modern democracy includes stuff like c

The true Scotsman fallacy is not relevant here because the modern concept of democracy is a constantly evolving term. The modern democracy includes stuff like civil liberties, equal rights, human rights (including minority rights), and protections from tyranny. Many of these (particularly human rights) only arose in the post World War II era. Now coups do indeed happen, but those are the result of an entity overpowering the democratic institutions, not the result of people voting them selves a dictator. If the people vote them selves a dictator, then obviously at least some of the democratic institutions which are supposed to protect those rights were insufficient, or altogether absent.