There's a pattern here. You may have quit because it wasn't working or it wasn't "meant to be." Or you may have quit because you were impatient. Or you may have quit because it was uncomfortable to stay in the discomfort. Or because you had different expectations. Or because you were eager for specific results and weren't able to see or process the results that you did get from your first or second project ("nothing worked" is quite extreme). Or because you struggled with perfectionism (which, as I'm learning now, can show up in many different ways). In my opinion, quitting after 1 year isn't a reflection of sunk-cost bias, but I'm not an economist. I just know over the past 13 years that none of my projects "took off" in 1 year. And each "failed" project was a foundation for the next one. Most of the time it took 2-3 years to really learn how anything worked. I was ready to quit the Library after 18 months. It just didn't work. Now it brings in 80% of my revenue. Almost 7 years later.