Departure of head coach after defeat at Freiburg sums up club that could join other fallen giants in second tier It could not go on. Even at this early stage the sinking feeling was familiar and impossible to shake, and something had to give at Borussia Mönchengladbach. The first Bundesliga coaching change of the season is upon us just three games in, and it is not a major surprise that it is Eugen Polanski departing. Neither is it a shock that Gladbach are involved; after all, it was at exactl…