I've said above there are a multitude of reasons to explain our failures in Europe. Which have ben numerous recently. To boil it down to essentially 'as a team, you're not good enough/ you're not suited to playing in Europe' is just far too simplistic imo.
I've said there is a general correlation between league performance and European ones and you seemed to disagree. Yet, as I said, over the past ten years in the PL:
Man Utd 5
Chelsea 2
Man City 2
Leicester 1
Cl titles: Chelsea 1, Man Utd 1
Finals: Man Utd 2, Chelsea 1, Liverpool 1 (2006/2007)
Semi-finals: Man City 1, Chelsea 3, Man Utd 1, Arsenal 1 (2008/2009), Liverpool 1 (2007/2008).
So surely you can see there is quite a strong correlation between the two most successful clubs and their success in the CL? Nobody is saying other clubs can't do well (ie Leicester now). But as a sustained thing? Don't think so really.
We'll need to see a big improvement in European performances and also a trophy or two imo for this team and Poch to get the credit they deserve (and rightly so). We need to take another step forward now.