So what exactly did Juve, Milan, Lazio and Fiorentina each get found guilty of?

The Seniors of the clubs bribed refferees and even though the referees may not have made unfair decisions, it is the fact that the bribe was ped that caused the clubs to be punished. I have reviewed many of Juventus' games last year and could not find any unfair decision, and the players won the league on their own merit, but there was the bribery that took place, even though it was not excecuted, there was corruption high up, and that caused them to be punished.