I wrote an entire book that was basically "I'm fed up with the world and my job right now, there's got to be more to life than this".

I found more meaning in my work as I got to know myself better. Similar to an oxygen mask in an airplane, I had to put myself first before I could for others(or work for that matter).

The only advice I'd give someone in this situation is to work on yourself everyday until you gain enough clarity to make your next move. Don't panic or do anything drastic until you're in a stable mindset.