This is the kind of attitude that makes people, companies, researchers hesitant to publish code online. Its free code for everyone to see, they don't owe you anything. Its not necessarily a "product" for your consumption, its just a repo.
If the author can clearly show the value proposition of their library, it will get more adoption, and the community and the author will get value.
If the author realizes they coded something that is already a well-solved problem, or a poorly-constructed alternative, the author and Nike could gain by throwing this away and going with a better alternative.
Personally, I wasted too many hours of my life creating a solution that did not solve any problems. Had I done some thinking and/or market research ahead of time, it would have saved me ton's of time to work on more worthwhile endeavors.
Good feedback is worth its weight in gold, even if it hurts a bit to hear it.
For every n-th solution in the market, n-1 existing ones could have been used, but they weren't for (many times) good reasons.
And looking at their Makefile and pyproject.toml I can see that they knew what they wanted.
Like it or hate it, it’s how social media works. Everyone posts other people’s things, and then more people get together to rip it to shreds.