The US Government was founded on/by the US Constitution. Are you saying you won't be governed by the Constitution either? One is meaningless without the other.
What the US government is doing now has nothing to do with the Constitution
Sure it does. The Constitution is what got us here. It was Alexander Hamilton's secret plot to enslave us.
Granted, Hamilton could just as easily have fought for the British, but he wasn't alone in contriving America's radical departure from its revolutionary principles. Unfortunately, some, like James Madison, didn't realize the Federalist motives until he and Hamilton had already shouted down the Antifederalists.
But though a radical shift to the left, the Constitution was still not a leftist document. Perhaps centrist, but not leftist. When considered, as originalists insist, in the context of history and the
Federalist, it prohibited the new government from acting without internal checks and balances, from centralizing power in a single branch, and from abridging the primacy of the individual.
The U.S. government is not constitutional now, but that's not due to the Constitution. It's due to progressivism.