I’ve told her what triggers my annoyance
You’ve generously told your wife that it’s now her problem to solve your irritability, and no one can do that for you. Watching someone chewing with their mouth open is clearly vile, but you can move, standing in a queue while the one next to you is going faster is a pain, but it’s just 2 minutes out of your life. Are they really worth grinding your gears about?
Anger is a que, it’s not like it’s a outside force you have no control over, it’s you making a decision to be angry at stuff that you have a choice either to or not to; feel anger about. What is it in your life that makes you angry? Fix that and a lot of these will go away. Bear in mind also, that society generally “allows” men to feel anger, but often any other emotional response is frowned upon, shedding tears is weak, etc etc..
your poor wife, though…