Palmer's "The Five Points of Calvinism" never presumes in any way to put the Institutes on a par with the Bible.
That would be blasphemy.
The Institutes are not the Book of Mormon. No Calvinist says the Institutes were written by God.
And they were no more divinely inspired than any written work of truth and righteousness.
Are you admitting that Calvin may have been wrong in some of his theology? If so, please point out just one part of his theology you think is or may be in error.
Are you trying to tell me that a statement such as "The Gospel is Calvinism and Calvinism is the Gospel" does not equate the two? If so, you need a very basic class in logic.