I don't think the average voter even knows how a democracy is supposed to work. They might find out how autocracy works instead. Even if he doesn't attempt a coup, by the looks of his cabinet picks, he's gonna attempt to gut some important cogs in the wheels of government. Then his mass deportation and sweeping tariffs will make a bigger mess, not to mention cost people alot more, if they have the funds to pay.
Right-wing news isn't very educational so I suppose that may be a factor in fooling people to vote for him too.