The US Constitution is explicitly anti-democratic, and it always has been, as the founders intended. I'm not saying this is a good thing, I'm just saying that's what it is.
The anti-majority aspect should be obvious at this point: the President lost the popular vote (and indeed got the votes of only 26% of eligible voters), and the majority of the Senate represents a minority of voters.
The continual part is also essential. The less frequent the votes and/or elections, the less the public is able to express their wishes (and hold representatives accountable). Lifetime terms on the Supreme Court are the worst aspect of this. A member of the Supreme Court may be nominated by a President who lost the popular vote, confirmed by the Senate controlled by a minority of voters and whose members are only up for election once in 6 years. The Supreme Court justice then may hold power for decades, even as the "political winds" shift underneath the Court.
It's also important to note how difficult it is to change the laws, especially the Constitution itself. The Constitution was amended relatively frequently in the past, but now it's almost unthinkable. Separation of powers, checks and balances, mean that a determined minority can prevent pretty much anything from happening. They can completely thwart the majority from acting or changing the existing laws (which unfortunately have no expiration date).
Remember that Plato defined democracy in opposition to monarchy and aristocracy. Universal suffrage, freedom to form parties and to manifest against the government are (part of) what defines modern democracies. Even Switzerland only resorts to referendums in relatively rare cases.
Limited ≠ Anti
Representative democracy is also limited compared to direct democracy, for example.
Partisan politics is tiring. The US is steadily becoming more and more mediocre while the rest of the industrialized world improves, because we are focused more on winning petty battles than improving our nation.