Can you please review the Show HN guidelines? I appreciate that you're not exactly flaming the OP here, but still, the idea is to respond more charitably to people's work. If you know more than others, find a constructive way to express that, such as by teaching them—and by extension, the rest of us—something related to what they've done so far.
This is a great point, and on a second reading my comment did come off as a little insensitive -- will leave it up to give others context and make this a teachable moment for all of us to improve the level of discourse :)
https://news.ycombinator.com/showhn.html
https://news.ycombinator.com/newsguidelines.html