Job replies that his life more or less sucks, and that egg whites are tasteless. Really, he does, right there in verse 6. Basically, he wants god to kill him. His only comfort is that he hasn't cursed god. He points out that his friends aren't exactly being supportive here and he hasn't asked them for anything. He challenges them to show him where he sinned.
Job continues that life is nasty, brutish and short, and that he hasn't been sleeping well, what with the scabs and worms. He thinks his death is near, so he gets to complain now. You and every other old person in the history of the world, Job. He bitches that when he sleeps, god sends nightmares. He asks god what his deal is with humans, with watching and testing us every second. He wants to be left along long enough to swallow his spit. Why does he need privacy for that? He challenges god to tell him what he did and how to seek forgiveness, then says again he's going to die soon.