repo is filled with low quality packages
That itself doesn’t bother me. That they are shown in search results does. We can do much better here.
a lot of unused, abandoned packages that are not developed for a long time
there are many forks of the same package, some developers prefer to fork a repo and upload as a separate package
Welcome to life. People do that. Sometimes they have good reasons for doing it.
I believe Rust deserves to have well maintained, curated, rich standard library (or two: for things running on and without os). This boosts ecosystem tremendously, future-proofs your code, makes life easier for new users and has many other benefits. It does require maintenance though.