It’s absolutely mad and extremely entitled to expect that a volunteer group of developers do an order of magnitude or more additional work for no additional pay or benefits to themselves.

Not really, if you're putting out something like programming languages and tooling, people expect them to work.

Especially because Rust devs brag so much about how it's soo superior to everything else, but then these amateur mishaps happen.

Rust isn't getting the exposure it deserves, I think, partly due to arrogance within the Rust community and a mental complex about "being better than everyone else" - that mentality never works