Now I've read it, what a pile of rubbish from Harry Redknapp!
 Has he ever coached England at senior or  youth  level?
This is a major problem offer England, quoting a distant mate of mine  who has coached in English pro youth programs, the English think football ends at the English Channel!
Southgates's  success  has been due to seeking  outside  ideas for coaching football from continental Europe, and, seeking the advice of international  coaches in sports outside football. 
The current England  might be a very good team on paper for England. Many  other countries also had terrific teams on paper who  didn't  make the Qatar WC, like Italy, or Spain Germany, Belgium, Denmark , et al, who exited Qatar earlier than they should have done according to the playing cattle they had on paper.