I read the review you did. Overall, I think the biggest problem is the few inline comments, which are really the heart of a good review. I'd suggest more in line, point out more things that worry you or were odd etc. And maybe a bit less praise - praise is good to a point, but it has become most of your feedback. Just keep in mind, when someone puts a work up, they hopefully want you to be more critical then a normal reader might be. Though some people just want the praise. can't win. :)
This is n example of what I mean:
You mention in the comments that you would have liked more southern descriptions - "I'd like to see a few more sensory desciptions of the south." If you had instead pointed out the parts where you wanted the embellishment in the inline comments, it would have been far more useful.

The problem with a beginner like me doing reviews is that I am giving an uneducated, untried opinion to people, and understandably...it frustrates them. Short story short, I was given a bad review score, even though I helped as much as I could, given my lack of experience. It's upsetting because I am giving these reviews my best attempt. I was hoping to get some advice on giving better reviews, so I'm not wasting time (others and my own) writing worthless reviews.