Drinkwater was at the club for the first half of this season, but barely got any game time.
"Difficult . . . I expected to do a few runs, train hard and play," he explained in an interview with Villa supporters on Instagram.
"The gaffer had a certain way and believed in his team.
"(There is) a great bunch of lads at that club who had a very good team spirit."
Regarding Villa's relegation battle, Drinkwater added: "I hope so [Aston Villa to stay in the Premier League]...it's a great club.
"Some changes needed and hopefully the club will be in the Prem for many years to come."