How does he use hyperbole in "London, 1802"?
The overstatement (hyperbole) of the fen / Of stagnant waters and the broad brush leveled against the institutions are clearly designed to show Wordsworth’s sense of alarm, not to describe each individual in the country. Wordsworth therefore dramatizes his point that the country needs new thinkers, and new guidance, in the tradition of public-minded thinkers exemplified by Milton. He does not publicly name anyone individual as that would greatly detract from any message that he was delivering. Hi use of hyperbole allows him to be freer than he normally would be and allows him to portray the problems of London as a collective problem with all responsible parties bearing some of the b;lame for the city's destitute state which the city is in now.