It’s been a strange season for Celtic. Perhaps it was always going to be that. In just two years, Ange Postecoglou had become a totemic presence at the Bhoys and his departure to Tottenham Hotspur promised to provide a rough adjustment period for Celtic regardless of who succeeded him. Brendan Rodgers had found success in Scotland before but even he has struggled to shake off the baggage of the rock-and-roll football Celtic fans so thoroughly enjoyed under the Australian. Despite being top of the Scottish Premiership for a large chunk of the season, there have been elements of unrest amongst t…