Dear critic, who my lightness so deplores,
Would I might study to be prince of bores,
Right wisely would I rule that dull estate—
But, sir, I may not, till you abdicate.
The way that the author writes this poem like a letter makes you infer, as the reader, that he is referring to a single person. By using the word critic and the tone of the poem he is most likely referring to someone he is not fond of, but knows that he needs them.
To A Captious Critic