Fine grained film and LF negs will have this effect on anyone and just about any grain magnifier. You might want to try one that has a higher magnification such as 25X. The average ones use around a 6 or 7X I believe.

When I have this problem of not being able to see the grain, I usually look for an area of the negative that will give me a small, fine and delineated sorce to judge the sharpness such as eyelashes, a zipper works well too.