I must agree with you that matters of public interest are of paramount importance, however the public interest, like beauty, may be in the eye of the beholder.
The interests of a member of the public (or even a large group of members of the public) is not the same thing as the public interest. From your posts all we know is that you had a tiff with the Regulator - nothing in that suggests, of itself, that matters of public interest are at stake.
No, I had no tiff with the Regulator's office at all. I wished to lodge a complaint /objection as to how a Financial Provider acted dishonourably at a number of levels at their operation and they simply will not take the complaint. All wrongdoings were in breach of the Consumer Code operated by the Regulator.