Used to feel that way about my job but now I'm know I'm pretty good at it.
However, I still feel that way about being an adult and life in general. I see folk talking about moving house, getting work done on their car, re-doing a kitchen or bathroom, kids going to school, having a garden, owning a home, being a parent, having a partner, having savings, having a pension and loads of other things and simply can't relate at all.