No Neuer, Hummels, Robben, Ribery. Goalie has played just 10 matches over the past 2 seasons. Most notable signings in recent seasons were Sanches, Hummels, Coman, Vidal and Costa but only 2 of these have been regulars. Lost the likes of Kroos, Schweinsteiger, Alonso, Lahm, Gotze. The Sule and Rudy deals were typical Bayern moves to weaken domestic teams but pales in comparision to the likes of Gotze, Lewandowski deals. So those in charge of transfers definitely need to shoulder a bit of the responsibility.
Ancelotti is not without blame too. Remember reading about how he stuck to the regular starting/best XI during his time at Real Madrid and PSG and seldom rotate/give chance to younger/squad players to develop them (as opposed to say Zidane who fully utilised the squad).