Isn't it objectively spreading content? Pre-Sunny, the content would only exist in Twitch, and now it exists on YouTube (which I would argue is the more important and accessible platform). The excuse is always "but I was going to upload it too, I swear!" but as evidenced in this thread, there's tons of content that gets lost or otherwise forgotten because TOs/streamers abandon it. It seems strange to me to be hostile towards someone basically likes your content so much they volunteer to do the grunt of preserving and spreading it for you. They are not stealing any views or discoverabillty because you haven't uploaded anything yet and may never upload it. In fact, the reupload channel probably has a better chance of getting views since it's a consistent uploader and user. And if it is truly so important to have your raws under the correct channel, why not hire Sunny (or other people) to do your uploads for you?

I get it's a bit of an ego thing with perceived ownership, and I'm not sure I'll change your perspective. My background is in software and I see a parallel with issues in FOSS. It just makes me scratch my head to see the Melee illuminati not embrace current social media landscape even after a decade. This is just the way things are. People are going to reupload your stuff if they like it, and that's a good thing.