I'm going to CBT you (as much as I hate it for myself, sorry!) and ask you to reframe this thought. You are tremendously helpful in your job EVEN WHEN YOU HAVE TO SAY NO because the person at least got some kind of answer and isn't just hanging in limbo on hold for 6 and a half hours.

I worked in a call center for 10 years; sick angry frustrated people called in and yelled at us, cursed at us, called us names, even maligned our characters and cast doubts on our parentage etc. It's very easy to feel resentful and internalize their emotions. The truth is I couldn't change policy to get them the answer they wanted and they didn't have anyone else to take it out on. I was told by my supervisor that even though it wasn't the answer they were hoping for, it allowed them to move forward in the process and request appeals so hopefully they would get the answer they were hoping for quickly.

We offered them a listening ear, an explanation they could understand, a list of resources they could apply for, and instructions on how to move forward with their case. Some people were satisfied with it and some weren't.

As you say, the world is full of assholes. I'd rather talk to them anonymously than be coworkers or underlings of them. If you're generally satisfied with your bosses and coworkers, your salary and benefits, your perks etc. then I would suggest looking for a commensurate position and researching the company's policies and employee reviews (if available) before you just up and quit.

Good luck Art, I'm sorry today sucks.