>all the boring bits

your problem is not focus or willingness, it's being motivated by excitement rather than perfection. it's about the object, take yourself and how you feel out of the equation.

This is also a personality trait. Where ADHD has this in the extreme.

I, having ADHD, cannot do any task if it's not motivated by excitement and newness (or forced by raw discipline, which is extremely energy consuming).

Your comment sounds like "it's just a matter of changing your mindset". Maybe I read that wrong. But I know it's not just mindset changing. It's, e.g. with ADHD fundamentally wired into a brain.

The act is the reward. If you can convince yourself this is true for various things, you get really good at them fast.

Of course. Bit it's an awfully big IF.

For people that enjoy this type of work, what you call the boring bits are the exciting parts.