Stepping in to this but first a question for clarification: Is your name Words-linger or Word-slinger. It makes a difference on perception.
"You think America is a democracy? Think again!!" My reply is, of course, no.
Civics has been mentioned and is an excellent place to begin.
Those of age and registration have the voice in America. The voice that wins is the voice with the most like minded votes. It's a pretty close debate/vote/outcome. When we live that close to a "rub" it's like being in the presence of poison ivy - irritating.
But, we have not lost our represented Republic and there is, still, representation.
Now, is that representation skewed by things like love of fame and fortune? Yes.
Are votes cast in the Congress to appease money sources for campaigns? Yes.
Do we see unions and special interest groups vying for the power to persuade elected officials? Yes.
But are we a Democracy? Never were.
Is that splitting hairs over words? No.