Oh definitely! I am the same. I'm not saying that if there is a legitimate problem then the frustration (at the company, directed at the rep) is necessarily undue.

However, I know enough people working in these kinds of jobs, and have heard many a tale which convinces me that a large percentage of angry callers are getting angry at the company for their own mistakes (i.e. are idiots who don't know what they're doing), and that's less fair :x "I don't know how to make this work/haven't read the manual/can't manage my own finances/etc so clearly it is your fault!"