I frequently hear complains from people about individual Wikipedia pages but most of the people who complain only complain outside of Wikipedia. Wikipedia is inherently democratic. If you read a Wikipedia article and think it's very problematic, take five minutes and write about why it's problematic on the talk page of the article.
Wikipedia is an important part of the commons. If you think from an EA perspective those five minutes (or even more if it takes you time to search for sources) have a good chance of being time spent with a good EA return.
While recruiting people outside of Wikipedia to individual pages to engage in discussion goes against Wikipedia's rules, simply engaging on Wikipedia and voicing your opinion is helpful. It makes it more likely that consensus on the article shifts in the right direction.
Given the discussion here and over at LessWrong where I crossposted this, I think when it comes to writing a larger post to make a more effective argument it's important to explain how Wikipedia works. It seems to me like many people think that changing Wikipedia articles is just about making an edit and hoping it doesn't get reverted.
This works for smaller issues but when it comes to big issues it needs more then one person to create change. I'm currently in a deep discussion on a contentious issue where I wrote a lot. If 3-4 people would join in and back me up, I likely could make the change and it wouldn't take much effort for everyone of those people.
When it comes to voting on an election you don't need to explain to people that even so they didn't get what they wanted this doesn't mean that there wasn't a democratic election. People have a mental model for how elections work but they don't have one for how decisions on Wikipedia get made and thus think that if they alone don't have the power to create change it's not worth speaking up on the talk page.
I also read that people think the goal of Wikipedia is truth when it isn't it's to reflect what secondary sources say. While it might be great to have an encyclopedia that has truth as a goal having a place where you find a synthesis of other secondary sources is valuable. Understanding that helps to know when it's worth to speak up and when it isn't.