How does one describe someone who is 'unethical'?

Describing someone as 'unethical' refers to a lack of adherence to accepted moral principles, which suggests a deficiency in ethical behavior and values. This aligns perfectly with the idea of having bad moral principles. Such individuals may engage in actions that are considered wrong or harmful, demonstrating a blatant disregard for moral standards that society typically upholds. Therefore, identifying someone as having bad moral principles encapsulates the essence of being unethical, indicating that their choices and actions do not align with what is generally perceived as right or good.

In contrast, the other choices either suggest ambiguity in moral judgment, attribute positive qualities, or imply a critical stance without addressing the fundamental aspect of moral integrity that defines being unethical. These alternatives do not accurately capture the defining characteristics of unethical behavior, making them less suitable for this context.