Oh hey my depression stairs are like that too, except that there's no chain and the stairs also go down forever into a yawning black abyss. But hey, with enough pills and therapy I can usually mill around in the middle somewhere, and haven't thrown myself off yet.
Currently dealing with this too. I started meds to help with anxiety, but without the anxiety the depression makes everything that much harder to accomplish
For me, something like this manifests in what I describe as not being able to un-see the big picture, the whole thing from beginning to end. Or, wanting to be able to see things that way. I can’t just blindly take single steps without thinking about and focusing on the endpoint.
And if there’s anything to be concerned about in seeing the big picture, some difficulty ahead I can foresee, or dissatisfaction with where I seen the end result going etc, than that’s what I need to focus on and I don’t understand why people aren’t doing the same.