Don't like something? Fork and fix.
Unhappy with a maintainer? Fork and maintain it yourself.
Some open source code creates issues in your project? Fix it and try to upstream. Upstream is not accepted? Fork and announce the fix.
Unpaid open source developers owe you nothing, you can't demand anything, their work is already a huge charitable contribution to humanity. If you can do better — fork button is universally available. Don't forget to say thank you to original authors while you stay on the shoulders of giants.