The antonyms for "corrected mid-course" could include wrong, mistaken, misguided, erroneous, inaccurate, imprecise, flawed, and deviated. These words describe a situation where a correction mid-course was not made, or if it was made, it did not result in the desired outcome. Such situations can be risky and can lead to unwanted consequences, and hence it is important to take corrective actions as soon as possible. It is always better to avoid mistakes in the first place rather than trying to correct them midway. Therefore, it is crucial to pay attention to details, be mindful of the course of action, and make necessary adjustments in a timely manner to avoid any mishaps.