Hodgson was the manager he took over from, so it's important to gauge southgate against his immediate predecessor.
Ramsey, had a great record despite failing to qualify for a euros
Robson had a good record, but had plenty of failures.
Uwe, that's your view on CR, but there are equally valid views on Egypt and Morocco that Robson faced. They barely had any players playing in major european teams.
Why take those 6 goals out? That's changing the reality to fit a prejudiced view. Those 6 goals against a poor set of players is better than Robsons 0 goals against a poor set of Morocco players.
As for Southgate's credentials as an attacking manager. He isn't a 'vindaloo' football manager ("we're gonna score one more than you") and never claimed to be. But his goal output in competitive football is strong.
San Marino 5
Iceland 4
Kosovo 4
Montanegro 7
Bulgaria 6
Kosovo 5
Bulgaria 4
Montanegro 5
Czech 5
Panoma 6
Malta 4
Of course the argument will be, yeah but these are poor sides, of course we score lots of goals vs poor sides, scoring 5 against germany or france is a once in a generation thing.