This is the church describing itself. Where is the evidence that the Great Apostasy didn’t happen?

This exhibit is descriptive by design, and the question deserves its own answer. The Christian reply is that the second-century sources (Ignatius, Clement, Justin, Irenaeus) show continuity of teaching on the core doctrines; that Jesus promised the gates of hell would not prevail against his church; and that the specific LDS doctrines said to have been lost (an embodied Father, exaltation, temple ordinances) are absent from the earliest Christian sources rather than present and then suppressed. A total apostasy should have left a trace of what was lost, and the early record shows the opposite.