The OT Book of Job is a teaching lesson that it is okay from time to time to get angry at God and it shows He does have big shoulders.
But do not get bitter though.
Thanks. I have witnessed people, myself included, who get angry with G_D when he does not answer our prayers or condemn him for the bad things that have happened to us.
But as I have gotten older, I have come to realize G_D allows bad things to happen, sometimes for our own good in the long run. And sometimes we bring bad things upon ourselves by not following his commandments or letting Satan deceive us.
But whatever one believes, G_D is sovereign and will do as he pleases.