Atheism is not the denial of the existence of God but simply a lack of belief in God. Over the last few years, I've been shifting further to the idea without real physical evidence, then everything that occurs in our thought-space is just fabricated imaginary delusions. And the only thing that is truly real is what we experience in the presence of others. Nobody denies the existence of apples. When I hold an apple in my hand I say, "apple". It's right there. I can't do that with God. As far as I can tell, God is just a word that only exists in our use of language. If people did not use the word God in sentences then God would cease to exist.
In terms of having a higher purpose and what our life means, I think our purpose is up to us to define. The most satisfaction I've ever had in my own life comes from my family, my hobbies and my crafts. The only thing that gets me out of being sad and depressed is doing some kind of hobby or craft. Developing my physical and mental skills has provided me the most satisfaction and happiness in life. Or guiding and helping my children grow up has been very satisfying.
In terms of ex-Deus Machina, I believe we are all champions of our destiny. If we soil our own beds, nobody but ourselves is responsible, and available, to clean up our mess. We are fully responsible for every single aspect of our lives. Based on human experiments, there seems to be no amount of evil God will not tolerate in order to preserve our free-will. God is always not intervening in the short term and always choosing his long term "plan", which as far as I can tell, is all just fantasy delusion only existing in our minds.
I've never been this far atheistic before in my life. Unless I have some earth shaking experience with psychedelic drugs, as far as I can tell, God is pure delusion having no basis in reality.