It seems to have a disproportionately high, relatively to society, percentage of white, male, strongly LGBT-oriented personalities, who usually have a female Japanese cartoon character, or maybe a furry, as their profile picture on GitHub.
Which is fine, whatever, but I worry that it suffers from groupthink and excludes different minds. Maybe it's hostile to plain people that just want to focus on programming? I suspect that people like Torvalds wouldn't survive long, and that's a shame.
And if you want to be really critical: Maybe the leadership is happy that specific people are leaving? Maybe burnout is a tool? Maybe it's a way of social control and censorship?
I personally hope that Rust finds more mainstream support and funding, because I'd love to work full-time in Rust for many years to come.