Purrpurr, congrats on arriving at reality! Yes the old publishing religion gave a sense of security which was a false comfort but real life has to be negotiated with rational values and common sense... and of course there are horrible things around us not the least of which are those caused by religious fundamentalism.
My own experience was to realise that there is no god even before I left the org. The meetings became unbearable, the crassness of the preaching from the platform made me squirm inside, I felt even though I was forty years old I was being treated like a child. I had an overwhelming feeling that I was not flourishing under the WT regime, I was getting nowhere quickly I was being stifled mentally and intellectually. I wanted to shout out at the meeting and say, stop this is madness! But sensibly I didn’t as I had planned to fade asap.
In answer to your situation ”how do atheists cope?” I would say firstly that atheist people (who are not a homogeneous group) get along fine just as religious people do. It’s true that True Believers like JWs put all their emotional eggs into the one basket of spiritual hope, take that away and they are floundering...and that is what I think you are talking about.
What characterises the human animal is their active intelligence in understanding situations and I think that to leave the depressing cult allows for a wonderful opportunity for personal growth. I was told on leaving school that I shouldn’t go to college, so, fool that I was, I became a window cleaner. (If you want to fail in life---join Jehovah’s Witnesses!)
Upon leaving the org, I began to study hard and started on my first college course at the Open University (UK). I love learning at uni level, it has given me the broad view of the power play in history and in society and illuminated for me more detailed information on my favourite subjects some of which relevant to my work as a designer. Good education gives a person confidence, or rather shall I say it gave me confidence and great pleasure... which are the very things taken from you as a JW drone.
So I’m suggesting that to counter years of religious indoctrination; firstly gain an understanding of what life is actually about; read and know why the org is wrong, catch up on education and secondly develop your own talents, make your own objectives...and really enjoy achieving them ‘cos the world is actually a wonderful place and full of lovely people!