I would disagree just because the success of the product (be it closed or open source) shouldn’t be dependent on the feelings of one person. You can be frustrated and angry, but it’s more useful to explain why you feel that way and what can be done to address it. Including your feelings only makes the person not want to do what specifically hurts you, not what is best for the project.
Oooh, need to find me a NAS buddy. I’ve been getting into using syncthing lately, I’ve learned that it can encrypt your files before syncing them so that the remote storage never actually knows what’s in them. Still probably need to trust the other end, though.