I just hate the idea that anything I said might stop someone from writing. I mean, even if it's horrible and makes me want to scream, they must have enjoyed creating it, so you know, IDIC. So I try to confine myself to tropes that annoy me more than being more specific outside griping to people in chat. *g*

And there really is no way to say "Your fic was a travesty and made me wish for sweet, sweet death. But maybe you'll do better later? And I hope you enjoyed writing it!"