Completely false comparison to compare England to Rovers.
Other than a very brief period under Jack Walker we haven't had the choice of the best players in the Country to choose from, in fact for most of the time, not even the best players in the Division. So you're not looking at anything like a level playing field.
Despite that in my time we've achieved actual success in 1975, 1979, 1992, 1995, 2002 and 2003.
Southgate has never achieved any success at senior level as a manager. I suppose he did get Middlesbrough relegated which I presume was very memorable for Boro fans.