It is very unlikely that your O3/O6 ratio is causing you to not have a six pack. The vast majority of the workout/bodybuilder world pays overall little attention to O3/O6.
That'd be a micro-fine tuning variable which would come into play at the very bottom of my list, if on my list at all.
Are you doing the basics? Are you dropping calories below maintenance? Are you working out? Some people will say you don't need to track calories, but I know for me my weight loss will stall out if I don't pay attention to calories, even eating primal. My guess is the problem is here. If you're doing the basics, next step would be to look into carb cycling and IF.
SW: 12/28/11 - 190.5 @ 24% BF
CW: 3/7/12 - 179 @ 21% BF
GW: 155-160 @ 10% BF