The antonyms for the phrase "being established" can vary depending on the context. For instance, in terms of a business, the opposite would be "being disbanded" or "being dissolved." Similarly, in terms of personal relationships or communities, the antonyms can include "being disorganized," "being fragmented," or "being disintegrated." In contrast, for something like a new idea or concept, the antonyms could be "being rejected," "being abandoned," or "being disregarded." Ultimately, the opposite of being established can encompass various shades of meaning, from simply not having a presence or structure to outright rejection or failure.