misguided
Definitions
Having or showing faulty judgment or reasoning.
Based on or resulting from incorrect ideas or information.
Examples
His misguided attempt to fix the engine only caused more damage.
The policy was based on a misguided belief that the economy would recover on its own.
She felt that his misguided loyalty to his former boss was holding back his career.
Synonyms
erroneous misinformed deluded misled ill-advised mistaken unfounded