Olusanya is not sitting out a game unfairly, he got 2 yellow card so it was red and he walked. The ref made a call on the day for the 2nd booking, Var are not involved so in his opinion the red card was justified, and therefore a suspension for the next game so all legal and above board so far.
Referees, the KMI panel, TV pundits, journalists etc re refereeing the game and deciding it wasn't a 2nd booking is just bullshit, he was a dirty bastard on the day and should have been off long before he was, along with Gogic and Laccoviti, as for Robinson he's full of shit.