Use 'injudicious' to imply a negative opinion about someone's decisions or actions. His injudicious investments led to a significant loss.
Pro Tip 2/3
Criticism of Decisions
'Injudicious' often describes decisions or choices reflecting bad judgment, not general behavior. Choosing to argue with the manager was an injudicious move.
Pro Tip 3/3
Formality Level
'Injudicious' is moderately formal, so it's more common in written language than in casual speech. The article criticized the politician's injudicious policies.