Maybe because there isn't ONLY ONE reason for our failures.
Again with reinventing the wheel.
The thing is, you are focusing on the smallest problems, which often aren t even a problem, but only a consequences of the underlying cause. Does that make sense to you?
The cause is very simple and you just need to aknowledge it:
The management screw up big time with setting up a team post-Guardiola era.
Everything from this point, when Guardiola left was a consequence of multiple bad decisions. A snow ball effect.
The problem no. 1 on your list started when? After Guardiola right? Why? Why did this problem grow more prominent? Is it Messi s fault?
Who is responsible for getting the right players and coaches and building a team based on multiple factors, which include their mentality?
It s not hard to understand and we ve been over this multiple times, but it seems like it s more fun for some ppl to pinpoint Messi s lack of leadership as a problem, or perhaps Dembele s lack of discipline.
It s absurd man.
First task after Guardiola left was to find a WC coach. Management failed to do this.
Than we had aging Xavi-Iniesta, we needed long term replacements. Management failed to do this.
This two things started Messidepencia. Of course the ball is gona go to the only guy who knows what to do with it. It was better with prime Suarez and Neymar, but we still didn t have much control-creativity in midfield.
There was a way to pivot from this point with more muscle-speed in midfield, but we had Busquets, Rakitic and aging Iniesta. So....
Again, it doesn t make sense to discuss Messi s shortcomings, when there are much bigger problems around him and most things you mentioned are the concequences of the snow ball effect.