Do you have any links to commits or changes that you think are "uncalled for"? Like, you say "he is making large and sweeping changes that are entirely uncalled for and cause breakage", so surely you have some examples?
As far as I can tell, most of the AI-assisted changes were security fixes and test-suite related, and I'm sure you can agree that both of those are normal maintenance.
Take a look at the commit graph. Activity is at an all-time high by far, which it absolutely should not be.
As an example, the entire test suite was recently vibe-replaced. An essential component for reliability and stability. And you can already see the results in the decreased stability and increased defect count.