Creating front ends that integrate different AI APIs is kind of over saturated, that's probably why you're not getting much attention. It's also somewhat hard to understand what's the value proposition of the website, you should focus on putting as much of that kind of information in everyone's face in the landing page, otherwise they'll just bounce. Take everything from your "Learn more" page and put it in your landing page. Simplify, condense and systematize the information in a way that makes it digestible and instantly obvious.

Also, I should note your comment is kind of off-topic, have you thought about creating a Ask HN talking about your issue? It's very possible other HNers could help you get your website and product more interesting. I would also recommend not being bitter about it, Hacker News is all about Silicon Valley and startups, the main rule for these is that 9 times out of 10 you'll fail. It's normal.

At last I should note, if you're doing things as a hobby, do them for yourself, remember to have fun and create NO expectations of what you will or will not be able to do. If you're trying to get a startup or product going, there's a reason why Y Combinator is so popular, if you truly believe in what you're building you should try getting it into an incubator.

Just my two cents.