Sorry, cannot blame it on genetics. You're no where close to your genetic limitation. I wish I knew this before, but it takes patience, hard work, blood, sweat, and a great healthy life style to see progress. But it's worth it.
If you're walking around the gym feeling comfortable and at ease then you're not workout out hard enough. I learned this tip from the guys here and it made a good difference. Keep your workout's intensity and volume in check.