Personally, I've developed my own point of view wherein you typically have 8 hours of work and 8 hours of free time (roughly speaking). Some form of work is a necessity to feed, shelter and clothe yourself and to maintain sanity, and some form of relaxation is a necessity to again maintain sanity.

So, you can attack it on both fronts. Your job isn't everything you always dreamed of? Well, if that dream job is out of reach for now, you can start working on your personal life. Half your life is spent working, but half of it is not. Don't overlook the chance to live that second half of life just because of work.

Yes, try to aim for a job you enjoy. But if you can't secure that dreamy job where work feels like play every day, all hope is not lost.

(FWIW, this is conclusion is not the result of a defeatist attitude, but rather the realization that the satisfaction I derive from my personal life lags that which I derive from my professional life. Consequentially, I can reap the largest improvements in my personal life. I can't take shortcuts and fill that void with more work, because my physical & mental health deteriorates when the balance breaks down in either direction)