Plenty of them around he said
no matter what you do
it ain't right you know?
They nitpick and nag
finding fault with one and all
never responding
in any way but self-serving

That's enough I said
spare me your rant
besides your verbs
never do agree
with their subjects
OK?

Michael Pruchnicki

http://www.poemhunter.com/poem/naysayers/