Look, this might be a little difficult for you to comprehend considering you are wilfully ignoring the point, but no, you don't have to be a famous streamer to have an opinion. I'm not a Zepla fan by any means. I watched maybe 2 videos of hers back when I was new because she did guides for making gil and things like that. That's literally the extent of my "fandom". I just happen to share her opinion on Endwalker because in my experience, the expansion as a whole has been a massive letdown.
You are free to disagree with that, that's fine. But don't expect your opinion to be welcome when you lead with ad hominem attacks and insults.