I must ask, before answering your question. At least, I think it is a question. Here goes:
How can you have a question that does not include proper punctuation?
So to answer your question, now that my OCD is out of the way, people of faith credit God with everything, not just their accomplishments. To those of faith, ALL things come through God, not just the bad or just the good, and therefore He is entitled to the credit He deserves.
If you are an atheist who is doing something outside God's power, you have acknowledged that God exists and that you are working outside of Him and His deeds. That makes you an agnostic (you recognize there might maybe be a god, any god) as opposed to an atheist (you don't believe in any gods at all). Under no circumstances could an atheist do anything outside of God's power, since an atheist wouldn't believe in a god to begin with.
And how you believe you accomplish things is up to you. You can believe you are your own power, or you can believe in a higher power. Either way could be seen as correct, depending on where you stand. How you accomplish things is all about PERSPECTIVE and PERCEPTION.