Why do Atheists see it as the best option?

I can tell I'm going to get insulted at some point in this topic. Ah well.
Okay so the very basics is that I live in the UK. And I am an extremely devout Greek orthodox Christian. Been one my entire life, and it has helped me a lot.
But that's not the point, what my point is that on the internet, on TV, and other places. Its really easy to find someone acting like all religions are really stupid. "flying spaghetti monster" is the easiest example to think of.
And I don't get it. I really don't guys. I honestly can't comprehend the concept that the world is better once you decide there is no God. I've tried to understand, think of an explanation and nothing.
What follows is MY OPINION if you see things differently, then I 100% accept that, mean you no offence, and have no wish to try and change your mind. Really. Okay we cool? Right then.
So to me, when I try to think of the concept of their being no god or divine power of any kind, and consider a universe where the big bang was an accident and everything is because of how science works. I can't help but see it as darker. You see in my beliefs , we are special, we are all loved truly by a God that truly desires our lives to be full of peace and joy. (I'm not going to start on the classic "bad things happen to good people argument" this is more or less the cliff notes.)
my beliefs hold that the world, maybe even the universe, was created for humanity and that there is a distinct, and concrete meaning of life and everything. No I do not have the arrogance to claim I know what the meaning is.
And I truly do believe death is not the end, everything is going to be alright and that we will all live forever, loved ones, heaven etc etc.
And I really do understand why people choose to say there is no God. Really I do. I've read intelligent and well thought out theories and statements that make good points, even if I disagree with them.
But I don't know WHY it is seen as a good thing. Can someone please help me understand why it's seen as better to believe in a world where life is an accident and holds no meaning. And once you are dead, all that greets you is oblivion. Yes that is the negatives of Athiesm, and that's the point, I can't think of plus sides to it.
Thank you for your time.