Hi, Chris! Awesome painting, I can definitely see that you are improving lots!
One of the primary things that stand out is the general composition. The composition is rather boring, as you're presenting your character at the center with nothing to compliment it. In fact, the characters colour is interfering with the background. This is because both are blue, making the character blend in with the background. You're avoided this by blurring out a lot of the background, making the crispy, detailed character stand out, but you're still at a disadvantage, because the entire piece is already very cold in colouring.
Looking at values, your background is thankfully darker than the character, which separates them value-wise, working with composition to push her to the front. Your other dark and white areas don't really form any composition, and sadly, don't guide the eyes anywhere. And some of your decisions kind of work against the central composition as well, such as the dark spot down to the right. Vignettes are awesome, because they darken the corners, in a way, stopping the eyes from moving out. In this case, this dark spot is far too big, attracting more attention than diverting it. There is also a dark line in the middle, that doesn't contribute to anything either, and which clashes with the central composition, making us want to follow them out, to no where. The blur also makes it annoying to look anywhere besides the character.
As for technique, I think you're struggling with edges and transition. Looking at your character, it is almost like a spider crawled all over it with blue and purple ink, for there are brush leftovers, making it very chaotic to look at your character. You understand general shape, as seen by your shadows, but you're struggling to define the proper shapes of her body, making it all seem blurry and off.
I've edited what I've mentioned above, as well as some of the anatomy and cleared out the messy texture. Hopefully this was helpful!