Repetitious. Those are synonyms, different words that have a similar or nearly identical meaning. Sullen and moody are adjectives that mean gloomy, morose, somber, resentful. Monotonous and repetitious are adjectives we use to signify that something is tedious, devoid of variations, dull.
It is an angry and generally lengthy speech or piece of writing used to strongly and forcefully criticize someone or something. It has also been defined as a prolonged discource in the past; an abusive or bitter opinion piece; or satirical or ironic criticism.