Sure, I know, it goes with the territory. But from my perspective, she provided no value. None, nada, zip.
You just had a bad agent. Much the same as bad employees at McDonalds, Burger King, Wendy's, Taco Bell, Best Buy, Circuit City, Post Office, Dealership, IRS agent, and President.
Just because one person is bad, does not mean all are bad.
Tom