The whole controversy started when Arnold was being interviewed for Flex Magazine and he was commenting on ' modern ' bodybuilding , the style in which the guys dressed , gym clothes , and how the currently Mr Olympia competed only once a year and headed back to England and he never really promoted bodybuilding like he did , he didn't mention Dorian by name which was the rub.
Dorian was right in the sense Arnold wasn't really up on the sport , he flew in once a year to the Arnold Classic and then went back to his mansion. Someone said this years ago Arnold might've been pissed to because Dorian never competed in the Arnold Classic , in which he deemed a lesser contest , his focus was always on the Olympia which is why he never went to the WBF despite McMahon offering his well into the 6 figures.
As far as 1980 is concerned I think it may have been close but I don't see Mentzer winning at all , you can make a case for Arnold losing but Mike wasn't close, Reminds me of what Shawn Perine said on the subject 1980 was no where near as controversial as 1981. Was Arnold as good as he was in 73/74? No but he wasn't competing with that Arnold , I think he was good enough to win and if not to beat Mike