If anyone submitted such a PR to one of my projects and could explain compelling benefits for why doing so would be a general improvement, even considering trade-offs of increased complexity/maintainability, etc., then I'd be delighted they'd cared enough to improve my software.
How is the drive-by statement of a random GH account with 9 followers representative of any community. What's the point you're trying to make? That there's people with shitty behavior in the Rust community? No surprise here, there are. That there's trolls out there that just do this for fun? It's the internet! I hope that doesn't surprise anyone by now.