That's why I asked the beginning question, about enacting the term limits law without Congress.
There are two processes to amend the Constitution:
a) Introducing an amendment in both houses of Congress as a Joint Resolution, which must pass both houses by 2/3; then passed by 3/4 of all State legislatures.
b) Constitutional Convention, called by 2/3 of all the State Legislature. This has not been done since the original convention of 1787.
Following "a", you would need the buy-in of both political parties in both houses and 3/4 of all State legislatures to remove power from their own hands.
Following "b", a Constitutional Convention would put
everything on the table. Which of your natural rights are you prepared to have infringed upon by our "enlightened" politicians, in the name of "good government"?