I'm a literary agent who's been on both sides of the desk. After about 4000 rejections for my own MS I got a job with a reputable agency, 30 years in biz.
In 4000 e-mail queries, I found a single snotty agent. He's opened himself to humiliation one day, as this kind of hilarity can make valuable copy.
This is no 9-to-fiver. One is up 'til the wee hours looking for quality work. In 2000 queries I found a single potential -- who didn't even follow submission rules. This first-timer is now getting thumbs-up from several "Big Guys." That's good writin'.
This is what puts food on our tables. Nobody I've rejected has got anywhere so far. We all keep watch to see how right or wrong we are.
Writers who have time for bitterness can't be very certain of themselves.
We get TONS of proposals from self-healed or been healed of something; a client's associate, incidentally, is going on Oprah for that.
My friends who have overcome worse hardships may never be heard from.
There's no pathology in turning down uninspiring queries. Many sound fraudulent. Let's get "obnoxious:" many were just too dumb to stay out of trouble. People that dumb may think they deserve a book contract and TV accolades, but their peers don't buy books anyhow.
This is a response in my "You Are Not Special" post.
Someone please explain it to me.
P.S. There are not 4000 literary agents in the United States. Maybe in the world. Maybe. And that's including assistants. And the cleaning lady who works in the agency building.