Which word fits the description of someone who is resistant to authority and difficult to manage?

The term that accurately captures the description of someone who is resistant to authority and difficult to manage is "recalcitrant." This word specifically denotes a person who is obstinately defiant of control or authority, often exhibiting a rebellious or uncooperative attitude. In contexts where leadership or management is involved, a recalcitrant individual tends to resist directives and challenges efforts to maintain order or compliance, making them particularly difficult to manage.

In contrast, "reproachful" implies expressing disapproval or disappointment, which does not necessarily indicate resistance to authority. "Quixotic" refers to someone who is exceedingly idealistic or impractical, often pursuing unrealistic goals rather than exhibiting defiance toward authority. "Sedulous" describes someone who is diligent or hardworking; this trait is typically associated with compliance and effort rather than resistance. Therefore, "recalcitrant" stands out as the term that best fits the description of being resistant to authority and challenging to manage.