It sounds to me like you may see your role as something like "being the best engineer on the team, and making the rest of the team as good as me" and that your

It sounds to me like you may see your role as something like "being the best engineer on the team, and making the rest of the team as good as me" and that your approach is to keep learning engineering methods and then "educate them." Might I suggest that what your role now is not to be the best engineer, but to act as their manager, primarily. Put down the engineering books and pick up some management ones (e.g. "Behind Closed Doors" or "Manage It!", both from Prag Prog), because you are likely the one failing to learn or improve in ways appropriate to your job.