Young claims the Frenchman alienated players with his authoritarian approach as Villa dropped into the bottom three in early January.
"It was one of the most unenjoyable seasons I've had in football," said the 32-year-old, who will line up against his former team at Loftus Road.
"Two years before that we were right up there in fourth or fifth come March time and were trying to push on and finish in the Champions League, which seems quite ridiculous now with what happened last season.
"Was Houllier like a school teacher? Yes, it was a little bit like that.
"You always felt you were getting judged on what extra work you were doing and weren't doing.
"It was: 'Are you in the gym doing your extra work, or are you not?'
"A few things went on that weren't great. It was a long, hard season and in the end we were really relieved to finish ninth. It seemed a little bit of a false position because it wasn't a great season for us."