Brief and simplified discernment to elaborate on the followings No Need for Dark Energy - Variable Speed of Light - YouTube, Misleading Concepts: Dark Matter - YouTube, and all related explorations and quests, And as well as solution forward:
It is essential to distinguish and recognize or realize that dark matter and energy are not the same as dark spectra-field since the formers are being explored as reducible and standalone parts while the latter is part of sum of parts of universal unified spectra-field. Another simple way of stating is variant in speed of light is only possible with ordinary and dark spectra-fields as parts of sum of parts of universal spectra-field.
Therefore, exploring dark matter and energy as irreducible parts of sum of parts of universal unified spectra-field is the solution forward. And as had discerned and illustrated in diverse ways in diverse past discernments.
Be Parts of Solution !
Epistemology of Life and Ontology of Existence Foundation and Institute