Your points are not untrue, but it's still a pointless nitpick. Democracy is something that comes in degrees. We have more of it than some countries, less than others, but we're certainly further along the spectrum of more than less on a worldwide survey. For example, candidates do not have to be vetted by religious authorities here, as they do in Iran. People are allowed to stand in the street and say down with the governement here (this right has been eroded around the edges, but try doing that in Cuba and see where it gets you).
So, extremely imperfect as our system is (and by fuck, there is a lot wrong with it), next month's elections are a meaningful exercise in democracy. Elections here can and do lead to a change in government. They are a limited exercise in democracy but that doesn't mean they lack meaning as elections in, say, Russia do.