Actually, one doesn't even have to go full asshole before reverting to being the "okay asshole" you detailed. I've always done most of the things you mentioned before I slipped into full-dick mode from time to time -- like #1 for example, I do it because if I don't I feel like I'm being taken advantage of and it'd just bug me whenever I'd think about it later on.
Full assholery is not sustainable anyway because you get shunned for it, and nobody likes to be shunned by too many people. I know that because I've lost a couple of friends for pulling a few dick moves on them and was too proud to apologize even though now I wish I did because I was blatantly at fault. Also, when you go full-dickhead, you get that look of contempt and disgust from many people and you can feel like a piece of shit because of it even though you pretend you don't care. Anyway, it's not a good place to be and not worth the pussy you get for it. Better just to stick with the things you mentioned.
But you know, I think this social opprobrium (general shunning, contempt, etc.) isn't such a bad thing because it keeps shitty behavior in check in society. Because if it's not kept in check, it just becomes an unpleasant place to live in. And no one wants to live in a society with too much shitty behavior, shitheads included.