It's definitely not childish to not want to be a manager, but beware trying to have it both ways - power without responsibility, autonomy without accountability

It's definitely not childish to not want to be a manager, but beware trying to have it both ways - power without responsibility, autonomy without accountability etc. That would actually be childish. As others have noted, the most straightforward thing to do here is to hire a manager to do most of what your current job entails and for you to move into senior/tech lead position. But if you do that and give up hiring, then you won't get a choice as to who to work with. If you give up supervising marketing's proposals, then you'll have to work to work on hair-brained ideas you could have veto'd in your current role. You give up mentoring/supervising junior folks and well, you'll still have to deal with their lower quality contributions, etc. As you contemplate giving up this role, make sure you're ok giving up all the privileges that come with it as well.