It just drives me bananas when people attempt to refute points with things that actually underscore the point!
I think it is true that, with a better manager, England would be in a spot where they should be expected to at least come close to winning things. I think this England side, on paper, is likely superior to the Belgium Golden Gen which is viewed as a disappointment and viewed as having been held back from poor management.
It bears additional mention that England gave France a helluva match in last year's WC, even with Southgate.
He is indisputably holding back a squad that should be contending for tournaments. I think it's hard to deny that, even if they are definitely not France tier.
More than anything beyond national team chauvinism, though, I think English academies deserve some serious credit for their shift over the past ten years. Long gone are the days of "we have 40 Jack Wilsheres at La Masia."