The antonyms for the phrase "most reached" are many, and they depend on the context in which the phrase is used. For instance, if the phrase denotes the highest level or peak of something, its antonyms would be "least reached," "lowest point," or "low ebb." If the phrase refers to popularity or fame, its antonyms would be "less popular," "least popular," or "ignored." Similarly, if the phrase denotes achievement or success, its antonyms would be "least accomplished," "worst performance," or "record low." In summary, the antonyms for "most reached" are relative and determined by the context of its use.