Being a technical leader is a set of skills that is distinct from being a great IC and those skills overlap management in many ways (meetings, dealing with people, diffusing conflict, getting buy in, etc.). Except you don't have resources to leverage directly except your own, now very limited, time so everything is 10x harder. I was in that boat, eventually I got tired and just got into management.
perhaps (perhaps!) you weren’t a good technical leader after all. the JD you put out there isn’t quite right. you do have other people to leverage...that is your job. you just don’t have hard authority over them. it’s challenging and you can’t get by on pure tech ability anymore. so many very very strong tech folks fail here because they don’t have the soft leadership skills.
your company and your boss have to support you (eg by not micromanaging, so that you can actually effect soft leadership), but the way you put it, failure is a foregone conclusion.
