The phrase "complete reversal" means a total change in direction or opinion. It implies going from one extreme to the opposite extreme, leaving no traces of the previous state. Full definition
Yet complete reversal is not possible, because physical feelings can not be derived from conceptual feelings. (religion-online.org)
Complete reversal of wrinkles is not possible without cosmetic surgery. (simplepurebeauty.com)
While private label's dollar share of the US CPG market has hovered stubbornly around 18 % in recent years, things started to change in 2017, according to new data from Nielsen, which says store brands have experienced a «complete reversal in growth trajectory... (foodnavigator-usa.com)