Does anyone know specifically what Burt Reynold’s problem with the film was?

Every interview I've seen with him on YouTube up until right before he passed away he said he was uncomfortable being in a movie about the porn industry. I think he also might have had some distrust in Paul Thomas Anderson since he was so young when he made the movie. I don't know why he would have even taken the role but I think that's what made the movie difficult for him.

I've read that Burt Reynolds was just very easily irritable on set and was really annoyed by a young PTA's happy-go-lucky, bright-eyed attitude. Like after every single take, PTA would get this big smile on his face and go "woow, wasn't that amazing?" and Burt would just roll his eyes and tell him to grow up. I personally would love to work with a director with that much passion, but Burt apparently was a more "shut up and get it done" kinda guy.

It was apparently a very similar situation to Wes Anderson and Gene Hackman on The Royal Tenembaums. Wes Anderson was this overly-optimistic fresh filmmaker who directed everything with a childlike wonder and it got on Gene Hackman's nerves.

Frankly the more I see of Burt Reynolds via various interviews over the last several decades of his life, the stronger the impression I get that he was such a bona fide mega D-type personality down to his core, it just made him a miserable prick about pretty much everything.