Woah, so, its his fault his wife was finding things he does, and trying to change his mostly thoughtless behaviors all the time?
Well granted I couldn't see what was going on, but just from the article its hard to find him at fault if like many relationships one of the partners is constantly finding faults in his basic unthinking trivial behaviors. I'm pretty sure that two people living together can find things about the other person that irritates them. That is not really a problem unless its willful (aka he is creating a real problem for the other person, or intentionally subverting them, etc). The much larger problem is the person who cannot control their emotions enough to recognize that the other person isn't doing it willfully and deal with it, without constantly trying to reprogram the other person. Sure maybe in a loving relationship both people try to avoid the behaviors that irritate the other person, but at the end of the day it seems this is a never ending road. A person can teach themselves to put the dishes in the washer, or turn off the light, but frequently this takes time, and sometimes old habits die hard. And then there needs to be an endpoint, and an understanding environment in place to succeed.
So, the constant nagging, complaining and taking it personally when the other person fails? That isn't the fault of the person who fails to live up to an artificial and constantly changing set of requirements.
The long term result of living like this and trying to constantly improve yourself to some standard being set by your partner? Its just going to be intense hatred when ten, twenty, thirty years later you wake up and realize that you have changed everything about yourself and they are still not satisfied.
So, no, unless it was willful, he isn't the one at fault here, she is for inventing things that bother her, and then getting upset when he doesn't agree that dishes need to be prewashed, or placed in the dishwasher individually rather than as a batch, etc. Because when he lived alone or with his parents it was perfectly ok to put them next to the sink and reuse them, and then run the washer when the sink got full, and now its suddenly not.
So, frankly he sounds like the lucky one. Lucky she moved on so he can focus on what he thinks matters rather than trying to meet this other persons standards and being punished for failing.