I know what epistemology is, but apparently you don't. "the fundamental nature of truth and knowledge, like whether reality is shared and knowable" is not epistemology but metaphysics. Epistemology may dip into metaphysics, (and vice-versa) but they are generally distinct fields.
By "our broken epistemology" I mean "our broken methodologies of evaluating the truth of our beliefs and the certainty of our knowledge". The brokenness of our practical epistemology is why these common misconceptions not only exist, but continue to dominate.
I could have been more precise and said "our broken epistemological systems",