We’ve been together a year and a half.  He’s from another country and has lived here almost 7 years.  He started getting nitpicky and quick to anger around 6 months in and since it has continued to increase in frequency and severity.  I’m not aware of any diagnosed depression or anxiety. There is nothing unusual going on in his life that I’m aware of.  His job is steady and not particularly stressful. He was married prior to our relationship here but that ended he said because they were always fighting. I think its safe to bet it was a very similar situation to what we are experiencing.  Maybe he has deep rooted anger and insecurity issues.