One-sided (adjective)

Favoring or biased towards one particular person or group, often to the disadvantage of others.

Origin:

Late 19th century: from one + sided.

Examples:

1. The judges were accused of having a one-sided approach to the competition.
2. The media coverage of the event was criticized as being one-sided and misleading.
3. The argument was one-sided, with one person dominating the conversation.
4. The agreement was criticized for being one-sided and unfair to smaller countries.
5. The report was one-sided and didn't take into account the perspective of the other side.