The stats actually paint a very accurate picture of this fight.
Clearly, Mayweather spends the first 3 rounds watching Conor and letting him hit air. Conor's accuracy in those three rounds is 24% 18% 12%.
At that point, Mayweather sees that Conor has nothing for him, so he starts walking him down, upping his output, showing little respect for Conor's arm punches.
Conor's defense is a joke and the stats reflect this -
Floyd is connecting with minimum 43% accuracy, and has rounds where he is landing power punches at 52, 57, 71, 77 and 79%.
So LOL @ you "Conor did great" groupies. Conor got toyed with and the ref had no choice but to save him.