Democracy seems to you like a meaningless buzzword because it's won so thoroughly. You're evaluating whether average citizens have independent influence, because the question of whether they have influence at all is completely uninteresting; who cares whether the majority can band together and vote a guy out of office if the "powers that be" control his replacement? But most guys for most of history did not agree that anyone should be allowed to vote them out of office!
I mean, who cares if people can band together to vote a guy out of office if the powers that be control his replacement?
Voting isn't any different than non-voting if it can't bring about real change for the better.