I would suggest looking for other places where you can post. For example, I know of two places that MIGHT be able to get you some positive recognition. Places such as Mibba or Wattpad are a good starting point. There aren't very many popular places out there where you will get noticed. Odds are, you'll end up the same there as you are here. I have a hard time with it myself. I know exactly where you are coming from. It's one of the reasons why I don't usually post what I'm writing on PC because nobody seems to care what I write. :/ I'm not saying you should give up or anything. I think a lot of it is because people have picky interests. Not only that, and this happens on Mibba a lot, is that you get a lot of people who read, yet they don't seem to have the notion to tell you that you're doing on amazing job or how you should improve.
I think you'll find that like Mibba, the fanfiction/other works section is pretty meager compared to what it should be. Not many people are active there. Some of them post stories there and expect feedback overnight. Some people actually do get it while others are left stranded. So, as I said, it's not really your fault. It's just the lack of popularity the writing forums have. That's why Nofalus and others have down all they can to boost it and make it more popular. I've heard them talking about how hard it is to get the writing forums noticed.
I do agree with Bay Alexison. I know it's easier to put each chapter into one post, but you also have to think of your readers. Most readers aren't going to read an entire post made with all your chapters either. Readers like things that they can wrap their short attention spans around. So, I think it would be worth a try to post each chapter in a new post. Try it, and see if you get more readers. It never hurts to try, you know? :3