@Ilovelifeverymuch
Well said, people are focusing on the wifi issue rather than the whole picture which includes 15 years of stonewalling, emotional abuse and frustration
That sort of treatment leads people to behave in particular ways, not all of them healthy. It is useful to recognise that not only do we dislike being mistreated, we may also dislike what we turn into when we are mistreated. Encouraging OP to look at her own behaviour is far from focussing on the wrong thing. Unless you think that OP is an irrelevance, here.
You are wrong to say that people who say this haven't been mistreated or abused themselves. One of the biggest lessons I learned about spotting abuse was that, when being abused or mistreated, I start to behave in ways I normally wouldn't, and don't always like. OP hasn't been back to tell us whether she goes about switching off the wifi when he's treating her well, but I would suspect not.
I think that it is you who are not seeing the big picture, as you are focussing on the fact that solely the abuser behaves in an unusual way. Very very often, the abuse pushes the abused to behave in unusual and sometimes unacceptable ways, too, and this is a useful to the abuser, to make the abused feel guilty and responsible.