If you wanted to compare MAN to any German airport, I would say Dusseldorf. Pre Covid both airports handled virtually the same number of flights.
DUS also underwent a new terminal revamp-remember the disastrous fire.. No national flag carrier based, as Lufthansa pulled out in 2018, but a substantial German/Euro wings operation, the huge one time LTU operation hasn't entirely been replaced. Three terminals - similar to Man, 2 runways like MAN, train station like MAN, similar pax numbers.
However, DUS was provided with large landslide bars, cafes, shops. Inter terminal monorail that serves all three terminals, car parks & train station. On demand (working) walkways & escalators etc.
The DUS passenger experience is far superior in so many ways.
The leaky skylink with the non moving walkways doesn't quiet cut it.