I don't think the problem is with you. I feel exactly the same way. And I'm baffled by responses that seem to be implying that you shouldn't criticize just because "most people don't agree" or "your opinion doesn't matter" or "you can just stop watching". As if that means you can't possibly be right. You're making thoughtful criticisms about a show you care about, and it seems nobody can even be bothered to actually engage with the criticisms, instead they just say you shouldn't be making them, or that they're irrelevant because he's still getting views. Well, I happen to agree with many of your critiques, and even if I didn't I think it's valid and valuable for you to contribute them.
Not all criticisms must be heeded, but you have to actually see the criticism in order to decide whether to heed it or not. If we say that all criticism should be withheld just because something is "still successful", then even the most helpful criticisms are lost, and with them any potential for something to improve. Of course it's Ross's decision how to make the series — no one said otherwise — but receiving feedback and considering it is part of that process. The fact that what Ross does is up to him is exactly why we should encourage feedback regardless of whether we like it or agree with it — because it's not up to us whether someone's opinion is valid, it's up to him. He's the only one who can decide what feedback to listen to, and he can't decide if he never sees it in the first place.