I'm sure Bayern can still put in another different performance in the Community League and it will be easy to beat them.
I don't understand what are you trying to explain, but it is not Community League. It is UEFA Champions League, this is the highest football competition in the world. No team has a guarantee to win UCL trophy, including Bayern Munich. In the quarter-final, Bayern Munich will face Arsenal, it shouldn't be easy for Bayern Munich to beat Arsenal. If you look at the EPL standings, you must be aware that Arsenal is strong enough to challenge Bayern Munich.
If you look at the strength of Bayern and Arsenal, the real system has strength that is not very high. Arsenal will try to spoil Bayern's time on the board and use the opportunity to win the trophy they play in this season's school tournament through the middle.
What real system do you mean? What I know both Bayern Munich and Arsenal are top teams in the world, they are almost the same in every aspect. They have quality squad, they have great managers, and they have good performance in this season. So, both teams actually have the same chance to go to the next round and may reach the final round to battle for the trophy.