The Bayern supremo believes the German is has an insatiable lust for power and is so paranoid that he "sees ghosts" and even wants to "print the match-day programmes" himself.
In a sensational interview, Hoeness also said that the players of every club Magath has been at have a party when he leaves, suggesting that the 60-year-old will never get a job in Germany again.
Magath won the double twice as Bayern Munich boss but was sacked the following year, with the club stuck in fourth place in the Bundesliga.
That track record might explain Hoeness' belief that the appointment of Magath usually leads to short-term success but long-term "disaster."
"Felix wants total power. He is also a very suspicious guy. He sees ghosts and is convinced everyone is always talking about him," the Bayern chairman told the Daily Mirror.
"This is why, at every club, he wants to become manager, director, coach, and even print the match day programmes.
"He goes well beyond the limits of physical challenges with players.He is pushing players to a ridiculous stage. Well over the edge.
"For him it is natural to squeeze the body of a professional player like a lemon to the final drop. It goes well beyond the stage where it gets unhealthy for the body of a player.
"This can lead to a short revival but in the long term it leads to disaster. Felix Magath has proved that at every club he has been.
"I knew Felix would pop up again somewhere as manager. But not in Germany. Here there is no future for him. I thought his only chance would be abroad, where they don’t know him well.
"He should ask himself why all the players at the clubs where he worked throw a massive party when he has left. Even when he was successful, they still had a blast once he was out the door."
Perhaps the following story, about a pre-season session where Magath tricked players into running two miles up a mountain before breaking down in tears on their day off, best explains Hoeness' points...
Did Fulham make a mistake hiring Magath?
image: © nicksarebi