Agreed.Nope I don't think so. He would still be a narcissist. She didn't do that to him. He was always a douchebag. Sure there would be some things a little different but I don't think she makes him that way. I doubt when the cameras is off they have much to do with each other. Or if they do it is fighting or arguments.
The house dynamic may be healthier without her. Abbie certainly is more relaxed and happy when she isn't around.
Asa's Asshat-ness is ingrained deep down to the core. That's why he could never keep a job for any longer than a maximum of 90 days (I'm willing to bet that most of the time he didn't even make it the full 90 days) and why he doesn't have any friends and barely talks to his family members.
No one can really stand to be around him and I think that's how it has always been. He's just a repugnant creature, narcissistic monster, and grand douche canoe master.