Yes, American Democracy has become irrelevant.
Democracy used to have two components: freedom of election and freedom to be successful. Both of these have been compromised.
Freedom to cast a ballot still exists. The ballot itself has become irrelevant. Because only members of national parties may run for office, the choice is between politicians who staunchly uphold “fairness” for everyone except themselves and politicians who only represent their donors. And the representation is linearly related to the amount of the donation. And fairness means serfdom.
Neither party wants individual Americans to be successful. One party opposes any citizen having any more money or possessions than any other. The other party wants money to be concentrated only in the hands of rich donors and politicians.