Here's why I don't critique unpublished work, especially by fledgling writers.
From Molière's "Le Misanthrope":
Oronte: ...as you are a man of brilliant parts, and to inaugurate our charming amity, I come to read you a sonnet which I made a little while ago, and to find out whether it be good enough for publicity.Lifted from a comment on "Will You Read My Novel?" at Miss Snark, the Literary Agent. In a related vein, see If I Let My Fire Go Out, How Can I Warm My Neighbor? at MJ Rose's blog, Buzz, Balls & Hype.
Alceste: I am not fit, sir, to decide such a matter. You will therefore excuse me.
Oronte: Why so?
Alceste: I have the failing of being a little more sincere in those things than is necessary.