I am from Belgium and I don't think they will win any time soon a big trophee (Euro cup or world cup); they always seem to fall short against the big countries. They have a couple of the best players in the world (De Bruyne, Hazard, Courtouis, Lukaku, ...) but talent is not enough. With this generation, the upcoming world cup is one of the last chances to win it.
I really want them to win something big, I remember their fantastic race in 2018, if they would have win with France I am sure they would get the Cup.
Last year I had a feeling the team was in worst shape, at least Lukaku seemed to be tired.
You are right that it could be the last chance for that generation of Red Devils, but I will keep my fingers crossed.