Earlier quoted context omitted.
Judge panels (like SCOTUS), county boards, city councils, school boards, non-profit boards and councils, corporate boards.
I actually don't think this is the case. Almost all of these in the US are largely bipartisan, not nonpartisan. In some cases they also tend to self select for people that favor certain viewpoints. NIMBYism is prevalent in local government, for example. They're optimized to serve the interests of the two prevailing parties in the US, which aren't the only two legitimate viewpoints.
I’ve had better experiences and I also find that issues that aren’t neatly D or R weigh more heavily on them in smaller or more local jurisdictions. I think there is a good case to be made for a similar dynamic on a social media’s board, where the mechanics of good moderation and guidance, combined with cordial operating principles, should be too front-and-center to ignore.