Then don't just send a PR: maintain your own fork.
I think that's the bigger part of open source. You can fork it, change it to your needs, and not give a damn what anyone else thinks about your changes.
Oh, that other open source trope, I should publish a book.
Because maintaining an entire fork of any non trivial software is... trivial :-)
Let's just admit that these are complex problems and frankly after watching the hype for almost 20 years, open source proved to be an alternative and a good refuge for many things but on the end user side the early hype until 2008 or so was 80% wrong.
I think that's the bigger part of open source. You can fork it, change it to your needs, and not give a damn what anyone else thinks about your changes.