The phrase "is in the saddle" is often used to indicate that someone is in control or in a position of power. Antonyms for this expression might include phrases such as "out of control," "powerless," or "at a disadvantage." Other possible antonyms may relate to feelings of uncertainty or indecision, such as "undecided," "uncertain," or "wavering." Additionally, antonyms could include phrases that indicate a lack of dominance or authority, such as "subordinate," "underling," or "submissive." Regardless of the specific antonym used, the opposite of being "in the saddle" is generally a state of vulnerability or weakness.