Dev's all problems boil down to poor management, nothing else. When he started this project, it was probably more like a hobby. But the game exploded, and he realized that moving forward is harder than he thought. He badly needs some project management skills that include planning, batching, delegation, etc. to speed up things.
I know we've discussed a lot about hiring people here. But I guess many developers are managing their game alone, releasing larger, more frequent updates, and everything is good for them.
Even now, as I can read that even Legend Patreons don't have access to the game. That's atrocious planning and management.
I believe it's all about being terrible at managing things.