Curbs had been told that he would have to balance the books this summer but was not expecting to have half of his first choice defence sold from underneath him.
Curbishley has had no say in any of West Ham's transfers since previous Chairman Eggert Magnusson was replaced and when George McCartney was sold with just hours left of the transfer window, despite Curbs wishing to keep the left-back, it was clear it was time to go.
Speaking yesterday Curbs said, ""The selection of players is critical to a manager and I had an agreement with West Ham that I alone would determine the composition of the Upton Park squad.
"But the club continued to make significant player decisions without involving me. In the end, such a breach of trust and confidence meant that I had no option but to leave.
"Ferdinand had made it categorically clear to me that he wanted to stay.
"Then I said no other players would be leaving — but McCartney was sold on Monday."