The 29-year old Polish gloveman continues to be frozen out at Old Trafford and it has finally sparked strong words as he seeks a loan deal away from the English champions.
Kuszczak was hoping to get a loan so he could play first team football ahead of next year's European Championships in his homeland but United blocked a potential move which has angered the former West Bromwich Albion man.
"I've talked to Sir Alex Ferguson recently," he said.
"I asked him to let me leave the club before the January transfer window.
"I told him I want to play and get back into the national team, because Euro 2012 is just around the corner, but it seems he doesn't care.
"The possibility of two months loan to Leeds came two weeks later. The club blocked it.
"It was a glimmer of hope for me. It would have reminded the Poland manager about me, but I didn't get the club's approval.
"Do they do it maliciously? I'm sad they behave like that. I've become a slave to Manchester. I'm frustrated, but I don't want to slander or criticise Ferguson. It's not my style.
"I have respect for him, because, for me, he's a great manager, but I hope he will let me go in January."