"Doest ones thing" is an idiomatic phrase that means to behave in a way that is in line with one's personal preferences or interests. Its antonym would be to act against one's will or desire, or to behave in a way that goes against one's instincts or values. Some possible opposites of "doest ones thing" could include following someone else's lead, conforming to society's expectations, or sacrificing one's own needs for the sake of others. Other antonyms might include acting selfishly or impulsively, ignoring consequences, or behaving recklessly. Ultimately, the opposite of "doest ones thing" will depend on the context in which the phrase is used, and the specific behaviors and attitudes it implies.