Why is suicide so reprehensible to god when he allows life to be so reprehensible?

If you have religious beliefs, suicide will always be morally reprehensible. God gave us life and he states in his word that to take ones own life, they would spend eternity in hell. God put everyone on this earth for a reason, and if you haven't died yet he still has a purpose for your life. The life of one person means more to God then humans could ever imagine.

Hope this helps!

God made our life which belongs to him alone. It would be unthinkable to commit suicide and basically tell God he was wrong to make your life. Your blood, your life is his. While its our choice as to what to do with it, it still is his. He offers advice on how to have a happier life and how to care for ourselves so that we do not feel the need to die. And life itself will get better as he promises it will. He will not allow bad things to continue. 

They probably don't understand either 1. what the nightmare is about or 2. his anxiety and stress

Try tylenol or see a professional