Yeah, if you still call yourself bad at something you've practiced daily for thirty years, most likely what needs to be corrected is not your skill set but your definition of competence.
If you don't feel like you know less and less every year that you are doing something then you are not gaining any wisdom and will likely never be truly great at it.
Plus, programming is extremely broad. You could spend 10 years mastering embedded linux programming yet know little to nothing about data science programming, game programming, GPU/VFX/shader programming, HDL programming, etc. There's simply too much to learn.
