Atheist, why just live even in the middle of life's turmoils?

Just be happy
Life is worth living because you can be content. Have simple tastes that are easy to fulfil and keep.
Life is worth living because you can find what gives purpose in life by trying new things and shedding old ideas for everybody is different and has different needs and you need to find out what makes you tick.
When you can get meaning from deluding yourself that the lies the Church tells you are true that shows that it is in your power alone to give your life meaning. You can do it another way. Hope. Trust in yourself. That is why the view that religion should be encouraged for its fantasies make people happy is unacceptable and stupid.
Nietzsche mentioned the asking of, "If time was not linear but cyclic, I would have to do my life over and over again forever. It will not feel like a repeat but it will be. Would I be happy with that?" If I am then I see my life has meaning for me. If we do not notice that we should not be seeking meaning for our lives for we already have it, we will be taken in by religion. We will be fooled.
If one looks deep inside, one will feel at least a little love for everybody. Knowing the love is there and feeling it brings better feelings and attracts thoughts of love. If you love, your life will be meaningful and religious theories about the meaning of life will be irrelevant.
Why suffer?
Christians all believe that suffering should be endured with love and humility when it cannot be avoided. If that is good advice, it does not follow that suffering happens for the sake of giving you an opportunity to humbly love as you live through it. The believer who suffers and who feels no love is praised as long as she or he harbours no malice or vice.
Thus for Christians, the teaching of the meaning of life is not about making you happy but making you virtuous. If happiness comes it comes but is not intended for it is not what the enterprise is about.
Christians say that people realise their suffering has meaning and value. I think many of them mean that if you are alive and suffering that can be better than being dead.
Many "holy" people say suffering should happen and it is good to suffer in itself. That is a twisted doctrine and if you have to condone the evil done to you to feel better and to give it meaning you need psychiatric help. Many do it for they want to say God is right to let terrible things happen.
Many teach the following view. It is that: though suffering should not happen, God lets it happen and he is right just like a parent is right to let a child go to the dentist when some suffering is unavoidable. They are saying suffering is evil but there is worse evil without it. How do they know? You can't just say a thing like that - you need solid evidence that the alternative is worse. They are saying that without suffering we would likely end up being spoiled children who don't care about God or each other. This teaches that caring matters for its own sake. That makes no sense. Caring only matters because we are in a world of suffering. Caring matters because we see suffering as something to be opposed. If we were not it wouldn't matter if we don't care. God is using us to get us to care for him. Better a world of spoiled but happy people than a world where innocent babies die. Trying to find a divine purpose for suffering is self-defeating and leads to you refusing to admit that God is wrong if he exists. And it is judgmental of God to let suffering befall us because he thinks it is likely that we will be spoiled without it. He cannot be sure if it is likely enough to justify allowing suffering. The thought that he knows what we would be like just plays into the hands of those who say, "God commanded the murder of pagan babies in the Bible. He did right for he knew they would be murderers themselves if they grew up."
If God is what gives your life meaning then surely you crave being with him? Thus your suffering will only be worsened by belief in God. The more you suffer the more you will want him and to be with him.
Buddhism holds that craving causes suffering. If you are in great pain and you crave relief that makes the suffering worse. The Buddhist solution is to see all that happens to us be it good or bad as impermanent and unrepeatable. That is what we need not God. Having the wrong answer means we are still left with the problem. God religion is a hindrance.
I find the following method of making life bearable and more enjoyable extremely effective. The person you are most interested in is yourself. Therefore if you make the habit of recording your day in detail in a diary and putting in times and the most mundane things you are making sure you will remember the good in that day. You will be able to look back at the bad and good later with fascination. It makes the bad less bad because you know that reading about it and the lessons in it will bring you enjoyment and a sense of confidence for the future. When you experience something bad you can say that in years to come you will still be able to look back on it and want to. You will learn from it. It will console you and make you more determined to live a happier and more fulfilling life. Great suffering can be waiting for you around the corner - all you can do is get through it without making it worse.
The Christian says even the atheist can be unselfish. It sees meaning in self-sacrifice.  If so, I can give meaning to my death by consenting to death when it comes so that I may go to make room on earth for another. World over-population cannot go forever. It is said that if you get a reason to let your life go and accept your end then you automatically give meaning to your life.
The atheist may see suffering as a part of life that cannot be taken away or avoided completely. This leads to acceptance. It thrives on courage. All people have to simply accept it - faith in God is a separate issue. An atheist can accept it as well as a theist or believer in God. But it takes time and patience and it is a journey.
The Crutch
If a person feels their lives have no meaning and they need to believe in religion then what? Bringing God in would be trying to make a crutch.
The use of religion as a crutch needs to be discouraged. Christianity says that discipleship of Jesus may make your life worse. Jesus said his real friends lift their cross to follow him and that the world will hate them for it hates him. The Christian is to follow Jesus even if he or she feels their life was better and more purposeful without Christian faith. 
You cannot ever take away anybody's religious crutch no matter how hard you try. They listen to you and they make the scales fall away from their own eyes. They take off the bandages covering their eyes - if they wanted to keep them on they would plug their ears against you. Yet they may think they do want to stay blind but that is merely ambivalence. They do and they don't.