If the club were meant to arrive back just after midnight, yet returned back at 4 in the morning, then it hinders the preparation for the next match. If players were meant to be in 1st in the morning for training, yet only got a few hours of sleep, then most likely they would not have had enough rest to recover from the previous game.
In regards to that pitch you’re referring to this-
http://www.espnfc.com/rostov/story/3082900/rostov-banned-from-playing-at-home-until-state-of-pitch-improves
Obviously Jose is moaning, the Russian FA must be too considering they deem the pitch unacceptable.