Frank J. Wilstach, comp. A Dictionary of Similes. 1916.

Bad

Bad as the itch.
—Anonymous

Bad as a blight.
—Thomas Hood

As bad, as what is worst.
—John Lyly

Bad as toothdrawing.
—Sir Thomas More (Pseudo Shakespearean)

Bad as marrying the devil’s daughter and living with the old folks.
—Poor Robin’s Almanack

Bad as the fighting bull of Stamford.
—English Proverb

Bad as two kings of Brentford.
—English Proverb