Ill-informed

Tom's ill-informed financial decisions nearly led to his ruin.

the ill-informed decision to close the hospital

The Southern Region takes, in the main, a candid line with its public. [...] An ill-informed attempt to blackguard the railway publicly is likely to see the complainant put politely—but very firmly—in his place.

Despite their age, and a spot of ill-informed mainstream media criticism, there is plenty of life left in the HSTs.