They chose to publicize their hobby project and put it in front of a bunch of people it doesn't work for, they can expect criticism from people doesn't work for.
Yeah, exactly. They're not being assholes they're making minor suggestions. They requesting minor wording changes and how the thing says it doesn't work outside a chrome. If people aren't allowed to say that then people just aren't really allowed to say anything.
I would rather everything people make that runs in a browser work in every browser but I get that there have to be limits and that I'm not entitled to someone else's labor.
They didn’t publicize it, someone else posted it. They didn’t even know about it until they got a notification from Vercel from all the traffic. Check out the creator’s top level comment. It was just a hackathon project that got some unexpected attention.
Besides, it's not like this is a website anyway.