Ryu what's wrong with your Bayern folk? Read a few Bayern fan forums and they're all calling for Pep's head like he's some scrub holding them down. Has the treble gotten to their heads so much?
They quite remind me of Barca fans after the decline in how spoiled and entitled their fans behaved.
Well, many of them probably only joined up after 2013. Can't take those folks all too seriously anyways.
On the other hand, there are definitely a few things Pep can be blamed for. Although it's not like we are utter shite now. Also, yesterday's result was also very much down to the absence of several key players, most evident in the desaster that was Bernat who caused 1,5 goals all by himself. I don't think Alaba would have given the ball aways so naively to Alves in that situation. There's not much Pep can do about individual failures. He is also hardly to blame for horrible refereeing that cost us the DFB Cup (or at least participating in the final of said cup).
All in all, we are still at least the third best team in the world and faced the currently best team in the world on their turf while being ridden by injuries, you can lose these kind of matches, even 0-3.
All in all, being third best team is not THAT shabby, even though it is absolutely evident that several players are past their prime/rarely ever fit (Schweinsteiger, Lahm, Alonso, Ribery).
It is up to Sammer, Killer-Kalle and Reschke to counter the obvious trend by signing the right players in the off-season.