The Champions League is not easy so in the end by looking at this condition of course we realize that it is not only about the players who must be upgraded but also in terms of other aspects such as mentality and game patterns that sometimes always become an obstacle.
Bayern is still one of the best clubs in the Champions League but their game pattern does look the same where they too often emphasize the style played in the Bundesliga and Champions League.
Direct attacks, although very good, have gaps where the defense will lose balance and that might have a big impact because of the difference in strength in the Bundesliga and Champions League which makes the results different.
We can see how they lost to Aston Villa because of a quick counterattack where Aston Villa was smart in taking advantage of the momentum when Bayern's direct attack had many gaps because the defense that helped the attack was unable to return and this must be a concern of course.
Kompany must think about strengthening his game strategy. Especially to face strong teams in the Champions League. This season, he must see how the weaknesses and potentials are most prominent in the team he has. Building a team is not easy to be able to dominate all competitions. They may have failed in the Champions League this season, but they showed that they can still compete, which I think is not inferior to other teams. Because in reality the teams competing in the Champions League are indeed the strongest teams in Europe.
The misfortune for Bayern in the Champions League is always happening because apart from the semi-finals in the last 5 seasons they have always been eliminated in the quarter-finals even with clubs that are not even favorites or dark horses they always have problems in this phase. I think now it's not about the players or the condition of the scheme although this is also still quite good where of course the strength of the players will add to the attack, but when their mentality remains unchanged and always overshadowed by the same mistakes then Bayern's situation will not change and forever they will rotate in the same position even though the league / group phase is good but their finish is still in the quarter-finals as it has been.
Kompany must emphasize more on the mentality of the players now and give more encouragement that in the end the Champions League is different from the Bundesliga which they have dominated since the beginning.
Their players are also not too bad although there may be some things that still need to be improved but in terms of the quality of players now they are actually still quite superior to some other clubs competing in the Champions League.