Comment by metalgearsolid

I have a similar story, but it was my first programming job, and it wasn't a cake-walk to get it, so for myself I simply couldn't imagine doing much better. And to be honest, after quitting, I haven't. I'm at least healthy and happy again.

But you're right, honestly the only thing I really learned about that experience was I should have just quit sooner. That's really all there is to it.