I'm going to go out on a limb here,
and speak a bold statement.
It's okay to be angry at God.
Ephesians 4:26 tells us not to sin in our anger,
which leads me to believe that,
anger in and of itself, is not wrong.
And if anger is not wrong,
why would it be wrong, to be angry at God?
King David was angry at God.
And so was Job.