The vibe coding got the project attention and it looks like he's going to get the help he needed.
However the "outrage", if you even call it that, wasn't entirely misplaced when pretty basic bugs were introduced by this, such as:
Can't use rsync with absolute paths:
https://github.com/RsyncProject/rsync/issues/922
Links mode is broken:
https://github.com/RsyncProject/rsync/issues/915
The scale of the commits, and rewriting the entire testing framework was pretty big for a "bugfix" revision.