Besides intentionally or unintentionally calling Ronda Rousey a man, Mayweather is correct that he has never directly disrespected McGregor or Rousey.
He mentions his earning power and some of the differences on how media covers certain athletes, but his annoyance seems to be more with the media, not Rousey or McGregor. Those are some valid points that can be discussed and debated cordially. Some may agree, some may disagree and that is ok.
In the interview below he states that he has nothing against them, has no plans to fight MMA, but plans to promote some MMA fighters in the future.