Then submits bugs and contribute to fix those bugs, it is the way open source works, if you don't like it, go use something else, nobody is forcing you to use it.
What does being open source have to do with having crap policies?
There are plenty of open source projects that don't have those problems, and it's not like the core team is interested in making theming anything else but a clunky hack so that everyone uses Adwaita...
