My greatest annoyance with the Bayern team was that they could not play the ball in the middle, always buddy flanking the Barcelona team without being able to cross the ball for heading out to make out something. Most times in the game it's as though they're afraid to take the ball forward, always returning it home and leaving Neuer to be making some bad decisions regarding spread of passes which almost cost them goals. It was only with the arrival of Musiala that the ball was being pushed forward and they mounted his pressure on the defense.
The finishers for Bayern were not also at their best. They missed good chances which did not come back again later on when Barcelona took the defense to another level.
I also think Neuer is getting old and less flexible for the first choice goalkeeper. Some goals conceived by him was a testimony of his being less fight for the job.
I personally see this more because Barcelona played better than Bayern Munich and of course because of the coach factor. It is true that there are some Bayern Munich players who are old which makes their performance no longer optimal, Bayern Munich must regenerate.
Bayern Munich's defeat was mainly due to Hansi Flick's very impressive strategy. Hansi Flick really changed Barcelona, changing tiki taka to play more directly, playing double pivot, high press, exploring Raphinha to various positions, successfully orbiting La Masia, the physicality and discipline of the players were more considered.
Moreover, at the beginning of this season many core players were injured, with the players he had he was able to bring Barcelona to compete as far and as great as this. The highest respect for Hansi Flick. Apart from that, what I really admire about Flick is that he managed to create a mentality like now, Barcelona no longer gives up when under pressure, we can see that after Bayern Munich's reply goal, they played more aggressively so they were able to slaughter Bayern Munich in this match.