I've worked on several projects where people looked at the site, which was simple and straight to the point, and people would straight up tell me they didn't take it seriously because it didn't have these performative UI things on it.
It's like when a Youtuber's audience complains about how they're constantly asking you to subscribe. The reason it happens is because the statistics say it works.
I don't think the commentary being made here is that startup websites should not be flashy. Just that, maybe they don't all need to look exactly the same as each other.
Same for clickbait thumbnails, people hate them, and yet don't really click on non clickbaity ones.
It really comes down to first impression. Your website design is your company’s first impression. If the design is clean, people will believe the product is clean and robust as well. Similar to how people think things that cost more and probably high quality and better overall.
As for this website, the best component is the ASCII animation in the hero and you can’t even copy that component. In fact, that nice ASCII hero is what gave me a good first impression to go thru all the components.