From the pictures that I can understand, there appears to be a custom torso to Apex, which is unfortunately the only thing I can really say stands out with this MOC.
The gear on the back of the lower legs doesn't help anything much at all, it just makes the calves look awkward. The head only really looks unique directly from the front, any other angle isn't very good.
For the most part, this is standard limbs slapped onto a slightly custom torso, which overall doesn't really speak well for the MOC itself. The head is alright, but the rest of it needs a lot of work.
Focus on custom limbs as the starting point and it should begin to really improve.