Poorly considered.

not well suited to each other; poorly matched.

having an unhealthy appearance / unattractive; ugly / of evil or sinister appearance

present participle of ill-use

simple past tense and past participle of ill-use

Having been treated badly.

Third-person singular simple present indicative form of ill-use

Poorly informed; ignorant.

Alternative form of it's an ill wind that blows nobody any good

The property of being ill-formed.