troublesome

This term describes a persistent source of irritation or a recurring obstacle. It carries a nuance of ongoing annoyance rather than a single, acute crisis. While a problem might be solved quickly, something troublesome tends to linger, requiring repeated effort or patience to manage.

When applied to people or behavior, it suggests a pattern of defiance or instability that makes supervision difficult. It is less severe than "malicious" or "destructive," focusing instead on the burdensome nature of the disruption.