If this was Facebook, I'd be tagging the group "this isn't an airport, no need to announce your departure."
Like, I get it when you start reading a story and you're disappointed, so you offer up a critique, maybe argue with other people's critique of your critique, 'cause you're into that sort of thing. You stick it out, you emphasise again and again what you wanted out of the story (actually, I don't know why you do that, seriously, go read a different story if you want a different story).
But then you get to chapter 10, and the special, and then to chapter 11, and you feel you absolutely must announce to the people who actually like reading this story, that you are going to drop it. That's peak attention-seeking right there. A comment that benefits no one.