Its fact. Name one of those managers who took us beyond a quarter final even once, let alone three times. Most of them arguably had better players too.
Let’s look at each managers runs
Keegan in Euro 2000
Portugal, Germany and Romania in the Groups - out
Sven in World Cup 2002, Euro 2004, World Cup 06 - out in QF in all 3
Sweden, Argentina, Nigeria, Denmark, Brazil
France, Switzerland, Croatia, Portugal
Paraguay, Sweden, Trinidad and Tobago, Ecuador, Portugal
Capello in World Cup 2010
USA, Algeria, Slovenia, Germany - out
Hodgson in Euro 2012, World Cup 2014, Euro 16
Sweden, France, Ukraine, Italy - out
Italy, Uruguay, Trinidad and Tobago - out
Russia, Wales, Slovakia, Iceland - out
Now looks at Southgate’s runs
World Cup 2018, Euro 2020, World Cup 22, Euro 24
Tunisia, Panama, Belgium x2, Colombia, Sweden, Croatia
Croatia, Scotland, Czech Republic, Germany, Ukraine, Denmark, Italy
Iran, USA, Wales, Senegal, France
Serbia, Denmark, Slovenia, Slovakia, Switzerland, Netherlands/Turkey