> When working on a project I am passionate about or I control, I can work much harder without burnout creeping in.

For me it was the opposite. I found that comment about burnout as unrequited love after burning out badly this year. I realized that I had been giving my whole soul to this project, loving it like a child, only to recently realize that the company didn't feel the same way towards me.

I've been doing a lot better in the last month because I've been able to refocus my love and passion on my family and keep work where it belongs: a way to provide for my family, nothing more. I still get my work done, but I'm less emotionally invested, and I've been much healthier because of that.