My failures in Factorio mirror my failures in programming

I like Factorio. I play it... well, like many games, I play it intensely for a little while and then don't play it at all for ages and then the cycle repeats. But I am not good at Factorio. Or rather, I am good (enough) at Factorio "in the small" - setting up a neat assembly line for a particular item or small set of items. But I am not good at Factorio "in the large" - starting from nothing and getting all the way to launching rockets.

I've started many new games, but I think I've only reached the "launch rockets" stage perhaps twice. Maybe even just once.

This is a mirror of my failures in my own projects. I start a lot of projects, but finish almost none of them.

Why is this? How can I change it? It makes me unhappy to feel that I never complete anything, even though there is no actual "need" to complete hobby projects (or to complete games).