“Unconstitutional” is a loaded term that fails to convey any meaningful insight if you consider the Supreme Court only has power because they declared it so.
That said, there isn’t a fourth branch of government and the strict boundaries of branches is a rather… elementary understanding how our government works.
If an independent agency is “unconstitutional” and a fourth branch, how would you define our Armed Forces in practice?
> the Supreme Court only has power because they declared it so.
The Supreme Court has power because the express grant of power in Article III; the idea that they could somehow fulfill their role in adjudicating cases and controversies arising under the Constitution and laws of the United States without both deciding what those writings mean and deciding whether something purporting to be a law of the United States was, in fact, an act authorized by the Constitution when that is precisely the source of the controversy before them is patently absurd.