I think you are probably spending too much of your time on software and too little time on marketing.
When I look at an open-source project, I ask myself three things:
1) What does it do exactly?
2) Is this easy to get started with?
3) Does it have any documentation?
For example, I have a use case for wanting to use graphql to communicate with elasticsearch. I google "graphql + elasticsearch" and somewhere a link to https://www.searchkit.co/ comes up. I look at it and I find my answers within 60 seconds:
1) Top of the page I see "Searchkit is an open source library which helps you build a great search experience with Elasticsearch. Powered by Apollo GraphQL." This makes me think that yeah, it's probably looking to solve a similar problem to me. In case I had any doubts, there's a demo.
2) Yes, easy to get started. There's a big "get started" button at the top of the page. And a get-started-video link at the bottom of the homepage.
3) At a glance, yes, it has decent documentation.
Given that I quickly got answers to these 3 questions, yes, I might consider using this project, or at least trying it out.
When I go to your page, I see:
1) River DB is a Rust connection pool and middleware proxy... ok... why do i need that? What problem is this solving? There's a long paragraph I can read after that, but when i'm browsing the web i don't usually read long paragraphs, so you've lost me already.
2) I have no idea how to get started
3) Doesn't look like there's any docs
Given the above, why would I use your software?
Note that the above has nothing to do with your software quality. But people only care about your code if things are breaking. Marketing material is what gets them in the door. For example, I use React all the time. I have NO IDEA if the underlying code is any good. And I don't really care. What I care about is that it's easy to use.
Anyway, long story short... if you want to build a software business, coding is maybe 30-40% of the job. Marketing, sales, documentation and all that jazz is probably the majority of the work. If you don't want to do that and you just want to code, then great, get a job. People will pay you good money for that.