Few things can trigger me more then finding a bug/regression and when tracking it down the commit reads like "modernizing the code", replacing all var with let, etc.
You are perfectly capable of saying "No, I like the color of my house already". Just pin rsync's version. This isn't some esoteric mechanism, it's standard practice.
If you were actually willing to charitably engage, tidge was working on fixing security bugs - your house had holes in it already! Your choice was to say I'm fine with the existing holes, or yeah please try to fix them. Unfortunately while fixing them he introduced some new ones, but hey, that's the nature of software development - sometimes you introduce new bugs when fixing old ones.
Again, this isn't some esoteric happenstance. It's so banal it must happen thousands of times per day across many other maintained projects.
Very bad advice these days.