You haven't tinkered with your diet enough until you try not eating any plants or sugars. I applaud you for trying, though. I don't buy the genetic argument just because you hadn't found a way to fix yourself with plants. Your organs definitely won't process and absorb nutrients from plants perfectly, because they were evolved to run on a high meat diet. They will process and absorb nutrients from meat most efficiently. This is why veganism requires supplements to be sustained for any length of time, and even supplements often lack bioavailablity of whatever they were supposed to supplement.

Go ahead, run your gasoline car on biodiesel and see how that works out.