Someone has always wronged him
As far as you can tell, his friends and family must be a group of real a**holes because every day he’s got some story of how one of them pissed him off. You like him and want to be supportive so in the beginning, you let him vent and you take his side. But, come on—everyone’s got someone who pissed them off on any given day. It’s only people with major anger or negativity issues who complain about it daily. The rest of us can brush it off and choose not to dwell on it.