I don’t think the WordPress team is bad, by any means, but I think this is a “team smell.” When somebody comes to your project with a well-thought-out, unit-tested fix, and is met by radio silence? The chances are high that they will never come back again. I have submitted WordPress patches in the past, but after this experience I don’t know if I will bother submitting them again. That’s a big change in my perspective on how the WordPress team works, and on how it should work.
Not what anyone in the WordPress Community wants, but I can’t say I’m surprised. Years ago I stopped bothering to try and get code in because...it was so much work no matter how much I did there was always something more.