It might just be his nature to be a whiner. My husband has belly ached about his job forever. I've listened, tried to help solve his issues, then realized he just likes to whine. Eventually I asked him to not come home being such a downer anymore. Either go to the gym or the bar, but blow off steam before blowing in like a black cloud. So he doesn't say anything usually, still doesn't blow off steam, and he tunes out the world by watching TV or on his iPhone. Bottom line, he is a perfectionist and can't stand when others don't give him the respect he believes he deserves. He told me even in kindergarten, he couldn't tolerate the disregard by the other kids for messing up his way of doing things. "I can't tolerate this kind of behavior", he told the teacher.