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.
The fact that one person can't change something alone isn't evidence against democracy. If I say that I want my government to implement policy X and my government doesn't do it that doesn't mean that I don't live in a democracy.
Democracy actually needs the engagement of more people. It's frustrating to me to read a reddit thread about how a Wikipedia article is flawed, when half the amount of engagement that the reddit thread gets would likely be enough to change the Wikipedia article. This doesn't mean that I want people to organize together to go to a Wikipedia article. The EA community gotten in a few conflicts in the past with that and they don't need to be repeated.
Whether or not you like Wikipedia doesn't change that it's a central part of the public narrative. Many people use it to inform themselves. Journalists frequently check the Wikipedia article to get an overview over the topic.