"the usual boring, small minded, bitchy people that you always find in offices"

Hey, speak for yourself! I work in an office.

"I live in a city of small opportunity so have ended up in low paid clerical work"

I think you have your answer right there. Take a big step. Move somewhere else. Gotta ask, if you are

a. A musician
b. Doing a dead-end temp clerical job

then at the very least least you could be doing a different dead-end temp clerical job somewhere more interesting.