The phrase "doest service" refers to performing a duty or providing a service to someone or something. The antonyms for this phrase depend on the context in which it is used. For instance, if we are talking about a servant who does a good job, the antonyms can be lazy, unproductive, or ineffective. However, if we are referring to a machine that is working effectively, the antonyms might be malfunctioning, broken, or non-functional. In either case, it is important to know the context in which the phrase "doest service" is being used to understand its antonyms properly.