My experience with open-source software is somewhat a love/hate relationship. Most of the tools I use (vim, nginx, go, etc...) are amazingly high quality but others are seemingly poor - i.e GIMP vs Photoshop, Pages/Word vs LibreOffice Writer. They look pretty awful, they have unintuitive UIs and generally I have a bad time using them. As such, my attitude towards open-source software is it's "shit" because it looks terrible. The code may be solid but the UX hasn't been refined. This is the main reason why I run OS X; I get to use vim and Photoshop.
In some small way, I feel like I'm forced to use software I genuinely do not enjoy using. I like using Windows and I like using OS X. So far, every Linux distro has forced me back to either OS within a few weeks. Even Elementary OS; practically a clone of OS X ships with sub-par software.
Almost all software I run is closed-source/proprietary. I'm making an effort to adopt better software but it's difficult to find high-quality open-source software. I'm currently looking into contributing so I am actively working on the issue rather than sitting here complaining.