It`s the way they lost, Holm was useless v Cyborg and Nunes, her punches have no power, and Rousey looked drunk while fighting Holm and Nunes.
I think you've set the bar rather high for an athlete to live up to. She is the most decorated boxer to win a single fight in the UFC. She won UFC gold. There's a lot of room between being exposed as a $hitty fighter and being the greatest of all time. It's not either or. Holm is one of 6 women to not get stopped by Cyborg, there's like 20 who have, and it was in a Fight of the Night effort. It was definitely better than Gina Carano's performance against Cyborg.