malcontent
noun /ˈmælkəntent/
/ˌmælkənˈtent/
[usually plural] (formal, disapproving)- a person who is not satisfied with a situation and who complains about it, or causes trouble in order to change it
- The strike was engineered by a handful of malcontents.
Word Originlate 16th cent.: from French, from mal ‘badly, ill’ + content ‘pleased’.