Actually I can't understand how anyone who writes in a fandom manages to read in it and still retain the urge to write. There's all your best ideas done by other people. Whether they're done wrong or right makes no difference to me: the sands have been tromped on and churned up by others, and I don't want to lie down there. It's different if they're Japanese others, because their language has no effect on mine, and once upon a time at least their takes were so far from my take as to be inspirational. But in English-- no. I require virgin fandoms; and if they aren't, well, I can be happy if the general camp, the BNFs and all, have written reams about her, so I have nothing known. Is why I don't read much fanfic.
I recall quite clearly arguing the other side of this with someone once long ago. 'Doesn't the awful fic make you want to show how it can be done right?' I asked her. She said No, and now I agree with her. It might be different if more fics were the eye-opening kind that do... well, something new and useful, to cite the old standard, and so make me want to do it myself. Very few are that. Most fall somewhere between mediocre and respectable and that, even more than bad fic, seems to be what makes me lose my creative hard-on. My writer's urges are of a Princess and the Pea sensitivity-- it takes nothing to send them sulking into a cave. They went into eclipse the other day merely from me opening the Y-con anthology at random and finding the line 'If a man layeth with a beast it is an abomination.' Jesus wept, I said, and went to bed an hour earlier than usual.