The expression "are in driver's seat" typically means to be in control or to have power in a situation. Some possible antonyms for this phrase could be "out of control," "powerless," or "at someone else's mercy." Other opposites might include "uninvolved," "passive," or "submissive." These antonyms suggest a lack of autonomy or decision-making power, and instead, indicate a position of vulnerability or dependence. In contrast to being in the driver's seat, these antonyms imply that someone else is calling the shots or that circumstances are dictating the outcome.