Yikes! Don't worry, I don't think you were overly harsh- you politely pointed out some legitimate flaws in the story and the author clearly overreacted. Unfortunately it seems that some people just can't handle reviews that are anything other than those of the ZOMG-BRILLIANT-UPDATE-SOON!!! variety. If it makes you feel any better, you aren't alone - I came across this a few days ago over at fandom_wank: http://www.journalfen.net/community/fandom_wank/914998.html