The Poland international goalkeeper was looking to leave Old Trafford in the summer so that he could pursue a career with a club where he would get regular first team football.
Kuszczak has made just 61 appearances during five years at Old Trafford and is now third choice behind new arrival David de Gea and Anders Lindegaard.
There was talk of him making a move to West Brom, but United put a £4million price tag on his head and that seemed to put interested parties off.
"I am angry and disappointed with the way I am treated," said Kuszczak in the Sun.
"I had a few good offers. The problem was the club who wanted to sell me for £4m."