I don't think I am, really. If dh is behaving like a twat, I tell him. If I thought he'd been an arse, I would deal with that head on (I like to think).
Had a friend a few years ago whose husband arsed up his career and lied, a lot. DH worked with him and knew the ins and outs and more besides. People tried to tell her the facts so that she could help him, as he was getting himself in deeper with his lies, but her reaction was to profess undying loyalty and pronounce that it was all a vendetta.
At the time I thought that wasn't loyalty since arguably she was making things worse for him. TBH I don't have a clear idea though - loyalty doesn't exist in our family so not part of my fabric iyswim.