Why would he do that? Do you think that he didn't know exactly what he was signing up for when he took the job? As though Ancelotti, his team and his agent didn't even do basic research and establish what was expected of him, what the long term goals of the club was and what he'd be given to spend in pursuit of achieving those goals?
Some of you need to learn that football managers and players don't think like fans on forums. Nobody with half a brain walks away from a multi year, extravagantly well paid job just because it's not as easy as they'd like it to be.