Personally I haven't. While Linux is imperfect, choosing the right distro makes the rest of the experience straightforward. And with it's whole complexity, I find Linux more user friendly than Windows. Even driver issues, broken shadow file ownership and KDE specifics only made me more confident about my choice to use Linux after I solved everything.
I like gnome's approach to a unified and opinionated human interface design. I think it makes a nice cohesive user experience. If other projects don't want that then they probably shouldn't be building off of gnome.