I spent 20+ years as a professional software developer, yet there were always days where I felt like I didn't know anything. That's part of the business - there

I spent 20+ years as a professional software developer, yet there were always days where I felt like I didn't know anything. That's part of the business - there's always something to learn and someone with more experience in some niche. Separate from that - it sounds like you need to decide whether this is really something you want to do professionally. Technology is a vast field, so even if you decide you don't feel good about being a software developer / programmer, that's not to say there isn't a place for you. Finally, I'm reading between the lines that you are primarily self-taught. Perhaps what's really needed for you to reach a level of comfort is simply more education?