There are several antonyms for the phrase "dost all right". Some of the opposites include: poorly, badly, improperly, insufficiently, imperfectly, unsatisfactorily, incorrectly, faultily, and unsuccessfully. These antonyms indicate the opposite of doing well, performing adequately or satisfactorily. They could indicate a lack of skill or the absence of the required resources to carry out a task. While "dost all right" often implies a level of success or competence, the antonyms provide an array of descriptors that would suggest the opposite. However, it is important to note that these antonyms do not necessarily reflect a permanent state, and there may still be room for growth or eventual success.