My new, post-2008 crashdown job, which started out as a promise for rapid, major advancement within my local town government (and has turned out to be mostly a maintenance gig) is a big disappointment, so far. However, my bicycle commute is what makes it all worthwhile.
My recommendation is to take steps to get out of a job you don't like; but, in the meantime, think of it as a good excuse to get on your bike each day.