He burned with anger ...
Then Elihu the son of Barachel the Buzite, of the family of Ram, burned with anger. He burned with anger at Job because he justified himself rather than God. He burned with anger also at Job's three friends because they had found no answer, although they had declared Job to be in the wrong. Now Elihu had waited to speak to Job because they were older than he. And when Elihu saw that there was no answer in the mouth of these three men, he burned with anger. (Job 32:2-5 ESV)
There is a very good chance that Elihu is the author of the book of Job. He is the only one mentioned in the book that details his ancestry. He has been waiting to speak and has heard everything that Job and his friends have said - perhaps he was taking notes? As he has listened to his elders speak passion has surfaced from his gut. He cannot understand why these do not understand why all of this has happened to Job. He spends the next six chapters venting.
In some sense grieving is very difficult to understand when we are young. The lessons of age often (but not always) provides us with a context to deal with loss. As we age we experience the loss of grandparents and then parents. We learn to grieve because we have to. Those who are younger, like Elihu, do not have that context and express deep emotions when bad things happen - and sometimes their anger is misdirected at those who are hurting the most.
Help us Lord to know how to be content with unanswerable questions. Teach us to be comforters and not accusers.