Forget about the lower votes, look at how many EU votes you have! That's fantastic! You're still new here and you wrote those reviews without the help of a mentor, that's huge!!!
I see that you have one now, talk with her about ways that you can improve, she'll be able to give you some good pointers.
Truth be told, we ALL get low votes sometimes. Does that mean we wrote a crappy review? No. Having one low vote and 10 higher votes shows that someone just didn't care for it, or perhaps didn't even take the time to read it!
Don't be so hard on yourself! You're doing a great job! Your rank will fluctuate as you participate more on Eden. Getting one or two low votes won't effect you that much, just keeps buzzing around the forums, writing reviews, and making friends!