My name is Wicket, and I have only recently realised that I was emotionally abused. I left a long time ago, simply because I couldn't stand him any longer, but now it's all becoming much clearer.
What's confused me a bit is that I don't think for one minute that he would see himself as being abusive (OP asks if it has to be deliberate). I don't mean that he would be in denial about it, simply that he would be shocked to have that label applied to him. He's middle-class, intelligent, well thought of in his work, even thought of himself as a feminist. And he was supportive (while we were married I completed my degree and then made a complete career change that involved a year in college full time). BUT the petty arguments, the walking on eggshells, the major arguments about minor things, the interrogation about what I'd spent, the continuous implication that the things I thought were important were in some way trivial compared to his concerns.
Strangely, he coped with major problems much better than minor ones - I crashed the car (totally my fault, hit a wall) it was no big deal, insurance dealt with it and he was concerned that I wasn't hurt. No blame, 'these things happen'. But if he found a pair of shoes in the living room, or (
) a packet of biscuits next to the sofa, he would go ballistic.
Did he abuse people around him? No, but also he pretty much avoided people as much as possible, to the point of being rude (wouldn't get out of bed if we stayed at my parents, so I would end up spending the whole of breakfast making excuses for him)
To return to the OP's question, I'm pretty sure he wasn't doing it deliberately, but I'm also pretty sure he couldn't help himself. It was like he had an idea of what things should be like and if they weren't like that it made him angry - and I happened to be in the firing line.