Hiding one's face from someone represents refusing to look at him or ignoring him. AT: "you refuse to look at me" or "you ignore me" (See: [[rc://en/ta/man/translate/figs-metaphor]])
Job uses these questions to tell God that since Job is so insignificant and weak, it is useless to persecute him. "Leaf" and "stubble" are metaphors describing Job's weakness, insignificance and frailty. AT: "You persecute me, but I am weak like a leaf blown by the wind and insignificant like dry stubble." (See: [[rc://en/ta/man/translate/figs-rquestion]] and [[rc://en/ta/man/translate/figs-parallelism]] and [[rc://en/ta/man/translate/figs-metaphor]])