Look, over there. Yes, just over there at that different job. Isn't it pretty? Doesn't the grass around it look so much greener? Wouldn't you be so much happier and fulfilled and content if that's where you were right now?
Because no one who does that job ever feels bored or frustrated or annoyed or anything like the burning feelings of gnawing resentment and failure you're feeling in this job. If you did that job, you'd probably become so contented in your daily toil that you wouldn't ever want to take time off again, or even sleep. Not that you get any time off or a chance to sleep in this job either, but that's not the point. In that rainbow-soaked dream job you wouldn't even want to. That's how great that job is.
Sure, you'd still be working, you'd still be getting paid for your time, you'd still be working your fingers to bloody stumps, you'd still be selling little chunks of your soul every day for meager financial reward, but you'd be doing that job, and that's got to be better than this job. Right?