Wow, I've never paid that much attention to Bob Saget, but when I've seen him before he's been pretty funny, versatile actor and performer and fairly original and funny.
So, I saw Bob Saget: That Ain't Right on my streaming HBOnow channel and thought I would enjoy some comedy. What I saw was what seemed to be an incoherent guy who was apparently convinced that he was or had been a comedian and still "had it" trying to be funny and dirty at the same time.
I watched, and kept watching and minute by minute I felt my life and my patience fading away. Gosh, I am sorry for whatever happened to Bob Saget, but that does not mean I want to be confronted with his problems and mental deficiencies for over and hour in a comedy special that is not funny.
Sorry to break it to you, but as I said, if you are close to normal, which I am not that close to normal, but I don't think an average person with an average sense of humor is going to find watching this comedy special worth your time ,.. especially if you have to pay for it. Don't.