Misfortune, and recited misfortune especially, may be prolonged to the point where it ceases to excite pity and arouses only irritation.
Source:
-- Dorothy Parker, (Aug 22 1893-1967), US author, poet, journalist, humorist; She was the celebrated caustic wit of the 1920s; wrote Enough Rope, 1926 and The Little Hours, 1944.