These perceptions are notoriously in the eye of the beholder: https://news.ycombinator.com/item?id=26148870. The opposite side to you makes exactly the opposite generalizations. It's obvious that these claims can't all be right. What's less obvious, but I think also true, is that because they're so identical, there must be some common mechanism producing them. I think it's that people's perceptions are strongly conditioned by their passions.
In other words, while "I rarely see" is no doubt true, the reasons for that have to do with your own filters as much as the objective situation. This explains why the opposite side reaches the opposite conclusions from the same data: they have the opposite filters. It's the same mechanism in both cases, and there are more than enough datapoints to support every pre-existing view. https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...
As you can imagine, what this boils down to is that all passionate political observers feel equally aggrieved and, ironically, all share the same perception that HN is stacked against them and they're being treated unfairly.