Now, I'm not an expert at all of this. I'm very new to being an indie author. But, I have gotten my fair share of bad reviews before I pulled my book from Amazon. When I first started in August, I thought all I needed to do was write the book and do some basic editing and I would be set. Boy was I wrong. After getting a few bad reviews, and a ton of comments about the lack of editing and flow in the book, I pulled it.
With every bad review, I allow myself 5 minutes to wallow in self pity. Once my time is up, I go back and reread the review a few times to see if what the person is saying has merit or not. I've learned a lot from my bad reviews, I've taken the criticism for what it is. It's a way to make my story better, and why wouldn't I want to do that? I think for me, with grammar and all the crap that goes along with that, I'm terrible. I know I'm terrible, which is why I like to have a bunch of critique partners read my book before I'm going to send it to the editor.
With every bad review you get, you have to take in consideration personal opinion. Not everyone is going to love what you write. Some people might even hate it. But, that's ok, you don't have to please everyone. So, to all my fellow author's out there, keep your chin up, this too shall pass. Happy reading and writing guys :)