Your biggest error is not knowing your audience. Many people here like the Harry Potter books for one reason or another. Myself, I am rather neutral on them. I think the earlier books were better, but her last book HBP was an editing nightmare. I came close to not finishing it because it was a convoluted MESS. She has done a good job of character development, but then she's had 6 full books in which to do this.
I do notice though that you "posted and ran" and haven't replied to any posts to you. That does get my "kitten meter" twitching. Come back and let's have a good honest discussion.
Mine too, but I always have to remind myself that most message board / forum sites move pretty slow in comparison to FR. I can imagine a newbie unfamiliar with the site posting a new thread & planning to come back in a few hours to see if anyone responded, then being shocked to see 300+ replies.