My family isn't in denial about the fact that I have PTSD or ADHD, but they still tell me I'm manipulative and lazy. They're in denial of certain symptoms, I guess you could say, and certain behaviors that I have or things I feel I need to do to not feel like crap constantly.
I just talk it out with my T, to see if she thinks I am being a jerk for any given situation - because I really can't tell myself. But I don't just trust, anymore, that I am being a jackass because certain family members say I am, though I know I have been at times. I try to just not bring up 'issues' with people who aren't supportive and I've learned to (mostly) shrug off most negative comments. Still gets to me at times though, makes my depression worse most times too. Really hard to stay motivated and in control when people put you down all the time. I've learned to basically write off my dads criticism in the moment, but I tend to constantly come back to it over and over again after, in my mind.
I can usually trust my wifes assessment at any given situation, but she's seen more symptoms (flashbacks and dissociation) than anyone else has. She doesn't understand completely, but she gets it and tries to be supportive, as much as she can, in the ways that she can.