With it being on a mockup like this, it’s a little hard to see the exact quality of the resume.
However, I can see that a lot of the text is misaligned. It’s obvious how you wanted the “grid” laid out, but most of the text isn’t fitting within it. Such as the dates under Experience and Education, the icons under Portfolio, the text under Skills, and the bars under Tools/Software. Even if some of these are in fact aligned, they don’t look like it because of the mockup.
The “XP” bars are also a little wobbly looking, in fact, everything looks like it has a little bit of distortion to it, but again, that’s probably due to the mockup.
In terms of the mockup itself, I’m not sure if you made it or not, but I wouldn’t use this one, it looks very fake. The shadows under the pen and plant are too uniform around the edges, and the quality of the plant looks different compared to the rest of it. The fold on the paper covers up part of your design, so we aren’t getting the whole picture.
With all that being said, I think the design might just be too simple for GraphicRiver to take. Not that it doesn’t make a nice resume, because it does, it’s just there are already MANY simplistic resume designs on GraphicRiver, and usually once a category gets full of similar designs, they stop accepting items to that category, unless it’s something that really sticks out.