Elite Bayern calmly flew out of non-elite Villarreal. And after 8:2, they barely won 1:0 in the Champions League. Barca's problem is style mania at any cost, the quality of players is not enough for this style against top clubs. Real Madrid calmly parks the bus and does not worry. Add calendar density and trauma.
And your argument is? Of course we want to build a team that can attack and dominate games. And of course surprise results can happen such as Bayern going out to Villareal.
That is Barca indeed. We want to play nice football and only when we get great at it can we win against the best. It's how the club works for decades.
We will build a great side again in the future, it is a near certainty. The problem some people can't accept is that it will take time, since football goes in cycles and our cycle right now is not good and the money are low.