malcontent:
(plural: ‘malcontents‘; pronunciation: the letters ‘mal’ rhyme with the word “mall”, and the letter ‘O’ rhymes with the letter ‘a’ in “about” — for the right pronunciation of this word, please click here)
The word ‘content’ has two different pronunciations, each giving a different meaning: 1. when the letter ‘o’ rhymes the letter ‘o’ in “pot”, it means ‘something or somethings’, such as the matter you write in an essay or the subject or matter you mention in your speech, the stationery you keep on your desk or things that you keep in your shopping bag, etc., and 2. when the letter ‘o’ rhymes with letter ‘a’ in “about” or the letter ‘e’ in “item”, like in this entry ‘malcontent’, it means ‘to be satisfied with what one has’, e.g. ‘He is content with his life.’ means ‘He is very satisfied and happy with what he has in his life.’ And in ‘malcontent’, the letters ‘mal’ shows negative “not”, like in ‘malpractice’, ‘malfunction’, etc., giving the meaning ‘not satisfied or not happy’. For the two different pronunciations of this word, please click here.

malcontents protesting
a person who is dissatisfied (not happy) with the particular way something is done or how some important affair is being handled or done, especially with politics and social affairs, and ultimately takes some action against such things;
an agitator; a troublemaker,

a malcontent
Our teacher calls herself a malcontent, and tries to educate others of and fights against the wrong ways in which women are treated in our present society.
One malcontent can disrupt a whole class of thirty students!
It’s quite natural to see many malcontents in this global financial crisis, taking to the streets show their displeasure in different forms, including violent methods.
Though young couples seem to neglect their old parents, in most cases, it’s the old people that behave like malcontents and deliberately annoy their children with their physical disabilities entwined with mental dissatisfaction.
