When someone is enjoying their career path and responsibility growth, it is an amazing experience for everyone.
When someone isn't enjoying it, it is MISERABLE for everyone. The problem is that in most cases the person in question asked for this career path. It's not their fault, they didn't know they wouldn't enjoy it. A combination of humility, denial and desire (for compensation growth) propels them to keep trying though. Because they are good developers and usually good people, it's hard to tell them they are performing poorly.
The best thing you can do for you, your manager and the company is to have a clear and concise conversation about it: I WAS excited about this path, but it's not working as well as I hoped. I still love being here, is there another path I can take?
A nice way to continue to contribute at a leadership level would be to mentor newer developers, work on some cross functional teams as an advisor, create programs that help others in the company develop skills (run the weekly demo event, create a lunch and learn for developers, etc). There are a lot of things you can do to support the growth of the company overall while keeping the scope of your actual responsibilities more well defined and focused on what you enjoy the most.