Yes, US presidents are elected via an anti-democratic mechanism, because the framers of the constitution were propertied elites who hated the idea of democracy and the threat of the poor majority voting against things like parasitic rents.
Clinton won that election by millions of votes. “Not enough people voted for her” is an ex post facto excuse for not confronting the anti-democratic structure of US elections. “It’s the fault of people who didn’t vote for her!” she literally won by millions of votes and the loser became president anyway. “Voting matters, look what happened when Trump became president” is the worst possible example you could offer for the importance of voting.