What you're "noticing" is not accurate. HN gets tons of comments that are critical of YC and YC-funded startups. We don't censor those, and in fact we moderate less, not more, when YC is involved: https://hn.algolia.com/?dateRange=all&page=0&prefix=false&qu...
Your description of those emails doesn't match my memory. I spent hours trying to explain things to you. That was not a refusal to explain.