I agree about gerrymandering, think the Electoral College is anti-democratic, and see you point about the way the Senate is set up (though that is maybe a bit trickier than the above 2 items).
But I feel like this is kind of outside scope of what we were talking about? The US is a flawed democracy, no doubt, and some political scientists argue it no longer functions as a democracy, but, it is still, both formally and somewhat in practice, a democracy.
