troublesome
Definitions
Causing difficulty, annoyance, or distress.
Difficult to deal with, manage, or control.
Examples
The troublesome child refused to follow the teacher's instructions during class.
Fixing the troublesome leak in the basement proved to be much more difficult than we initially expected.
Synonyms
annoying bothersome difficult vexing burdensome irksome problematic
Antonyms
easy helpful convenient agreeable manageable simple accommodating