> It is easy to criticize founders when they launch something new. Given enough time, you'll often look smart for doing so since nothing is perfect, and most startups don't end up the way founders hope at the beginning.

That's fair, which is why I typically haven't commented on Show HNs/Launch HNs. However, when a startups receives a substantial amount of venture capital from a(nother) top tier firm based on that startup's idea, it's also fair to open the startup to more scrutiny/skepticism.