What If The People In Your Life That Matter Don't Accept Ptsd As A "real" Thing?

I m really at this horrible place after 2 1/2 years of therapy, etc - because I need my immediate family to 1) accept that it s a "real" medical thing, just like cancer is a real medical thing; 2) cut me some slack and not always act like I m the bad guy 24/7 because I don t "do things like I used to" or "have the same interests" or whatever; 3) view me as weak or flawed or a bad person. How do you get other people to understand that what you have gone through is real and you re really... What If The People In Your Life That Matter Don t Accept Ptsd As A "real" Thing?
https://www.myptsd.com/c/threads/what-if-the-people-in-your-life-that-matter-dont-accept-ptsd-as-a-real-thing.52384/