I read through the article, and while critical of Paul Graham, it wasn't out of line or insulting or something.
I'm also surprised that it got removed from Substack (which is a YC company) - not sure why the author himself would have removed it?
What's happening?
Edit: Yes, it looks like the author removed it from Substack: https://twitter.com/MichaelOChurch/status/1336033522327445504?s=20
But still worries me that it was flagged down on HN.